added go module support

go.mod

@@ -0,0 +1,14 @@
+module github.com/desertbit/grumble
+
+go 1.12
+
+require (
+	github.com/desertbit/closer v2.0.1+incompatible
+	github.com/desertbit/columnize v2.1.0+incompatible
+	github.com/desertbit/go-shlex v0.0.0-20150515145356-3f9db97f8568
+	github.com/desertbit/readline v0.0.0-20171208011716-f6d7a1f6fbf3
+	github.com/fatih/color v1.7.0
+	github.com/hashicorp/go-multierror v1.0.0 // indirect
+	github.com/mattn/go-colorable v0.1.1 // indirect
+	github.com/mattn/go-isatty v0.0.7 // indirect
+)

go.sum

@@ -0,0 +1,21 @@
+github.com/desertbit/closer v2.0.1+incompatible h1:vC58rDu6nwxrBvibQ/TEmtPGnfscC8n0GExFzYXsLjE=
+github.com/desertbit/closer v2.0.1+incompatible/go.mod h1:kYgYVgfyW2gRrbZ/trEqb+RPqaYczGtpIINsZD2tNbk=
+github.com/desertbit/columnize v2.1.0+incompatible h1:h55rYmdrWoTj7w9aAnCkxzM3C2Eb8zuFa2W41t0o5j0=
+github.com/desertbit/columnize v2.1.0+incompatible/go.mod h1:5kPrzQwKbQ8E5D28nvTVPqIBJyj+8jvJzwt6HXZvXgI=
+github.com/desertbit/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:Kt3BVZKcFOZ3xaI1G6EHd2eM8boRvm5qCs/AZBr9ysQ=
+github.com/desertbit/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:igZLYq+xJYskT7PXx1VyRk+3MlQ5geJnvQuO8HQlyKY=
+github.com/desertbit/readline v0.0.0-20171208011716-f6d7a1f6fbf3 h1:PLbrJOpAtk8ros5avAt8am0GJvPuD08FVLV+ffmG0Jo=
+github.com/desertbit/readline v0.0.0-20171208011716-f6d7a1f6fbf3/go.mod h1:AayRnEOr0ttSh4kgOlHBBtJufZMMW/1BVCdV5oFs8t0=
+github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
+github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
+github.com/hashicorp/go-multierror v1.0.0 h1:iVjPR7a6H0tWELX5NxNe7bYopibicUzc7uPribsnS6o=
+github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
+github.com/mattn/go-colorable v0.1.1 h1:G1f5SKeVxmagw/IyvzvtZE4Gybcc4Tr1tf7I8z0XgOg=
+github.com/mattn/go-colorable v0.1.1/go.mod h1:FuOcm+DKB9mbwrcAfNl7/TZVBZ6rcnceauSikq3lYCQ=
+github.com/mattn/go-isatty v0.0.5/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+github.com/mattn/go-isatty v0.0.7 h1:UvyT9uN+3r7yLEYSlJsbQGdsaB/a0DlgWP3pql6iwOc=
+github.com/mattn/go-isatty v0.0.7/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=