diff --git a/package-lock.json b/package-lock.json
index d0e07423a..e948134e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "underscore",
-  "version": "1.8.3",
+  "version": "1.9.0",
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+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
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@@ -152,6 +158,12 @@
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+      "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
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@@ -170,6 +182,12 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.0.tgz",
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+    },
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@@ -194,6 +212,79 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
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+      "requires": {
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+        "component-emitter": "1.2.1",
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+          "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
+          "dev": true
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+        "define-property": {
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+          "resolved": "https://registry.npmjs.org/define-property/-/define-property-1.0.0.tgz",
+          "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
+          "dev": true,
+          "requires": {
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+        "is-accessor-descriptor": {
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+          "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
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+          "dev": true,
+          "requires": {
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+          "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
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+          "dev": true,
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+          "dev": true,
+          "requires": {
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+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "dev": true
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+          "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
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+        }
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@@ -323,6 +414,37 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
+      "integrity": "sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==",
+      "dev": true,
+      "requires": {
+        "collection-visit": "1.0.0",
+        "component-emitter": "1.2.1",
+        "get-value": "2.0.6",
+        "has-value": "1.0.0",
+        "isobject": "3.0.1",
+        "set-value": "2.0.0",
+        "to-object-path": "0.3.0",
+        "union-value": "1.0.0",
+        "unset-value": "1.0.0"
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+          "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
+          "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
+          "dev": true
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+        "isobject": {
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+          "resolved": "https://registry.npmjs.org/isobject/-/isobject-3.0.1.tgz",
+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "dev": true
+        }
+      }
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@@ -333,7 +455,8 @@
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       "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -406,6 +529,35 @@
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       "dev": true
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+    "class-utils": {
+      "version": "0.3.6",
+      "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
+      "integrity": "sha512-qOhPa/Fj7s6TY8H8esGu5QNpMMQxz79h+urzrNYN6mn+9BnxlDGf5QZ+XeCDsxSjPqsSR56XOZOJmpeurnLMeg==",
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+        "isobject": "3.0.1",
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+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "dev": true
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+      }
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@@ -448,6 +600,16 @@
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       "dev": true
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+    "collection-visit": {
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+      "resolved": "https://registry.npmjs.org/collection-visit/-/collection-visit-1.0.0.tgz",
+      "integrity": "sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=",
+      "dev": true,
+      "requires": {
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@@ -529,6 +691,12 @@
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+      "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
+      "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=",
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@@ -629,12 +797,71 @@
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       "dev": true
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+    "decode-uri-component": {
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+      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
+      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "dev": true
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       "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=",
       "dev": true
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+          "dev": true,
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+          "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
+          "dev": true
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@@ -662,6 +889,12 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/detect-file/-/detect-file-1.0.0.tgz",
+      "integrity": "sha1-8NZtA2cqglyxtzvbP+YjEMjlUrc=",
+      "dev": true
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@@ -833,6 +1066,12 @@
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+      "resolved": "https://registry.npmjs.org/ensure-posix-path/-/ensure-posix-path-1.0.2.tgz",
+      "integrity": "sha1-pls+QtC3HPxYXrd0+ZQ8jZuRsMI=",
+      "dev": true
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       "dev": true
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+    "exists-stat": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/exists-stat/-/exists-stat-1.0.0.tgz",
+      "integrity": "sha1-BmDjUlouidnkRhKUQMJy7foktSk=",
+      "dev": true
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@@ -1170,12 +1415,42 @@
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+      "resolved": "https://registry.npmjs.org/expand-tilde/-/expand-tilde-2.0.2.tgz",
+      "integrity": "sha1-l+gBqgUt8CRU3kawK/YhZCzchQI=",
+      "dev": true,
+      "requires": {
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       "dev": true
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+    "extend-shallow": {
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+      "integrity": "sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=",
+      "dev": true,
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+        "detect-file": "1.0.0",
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+          "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+          "dev": true
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+          "dev": true
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+          "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
+          "dev": true,
+          "requires": {
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+            "array-unique": "0.3.2",
+            "extend-shallow": "2.0.1",
+            "fill-range": "4.0.0",
+            "isobject": "3.0.1",
+            "repeat-element": "1.1.2",
+            "snapdragon": "0.8.2",
+            "snapdragon-node": "2.1.1",
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+            "to-regex": "3.0.2"
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