builder的update与where map支持传入_custom_前缀的key&&Comparable的value (#151)

* feat: add custom sql support and several json helper function

* doc: update builder readme.md since additional new custom functions

feat: build delete support limit (#148)

* feat: build delete support limit

* feat: build delete support limit

* feat: build delete support limit

* feat: build delete support limit

支持对scan后rows.Err()检查 (#144)

support multiple _or

try to use sql.Scanner prior to handleConvert

update builder doc

feat: support building INSERT ON DUPLICATE KEY UPDATE clause (#102)

* feat: support building INSERT ON DUPLICATE KEY UPDATE clause

* update builder README.md about BuildInsertOnDuplicate

enhance #74: builder relax the syntax restriction of orderby operator (…

…#87)

* enhance #74: builder relax the syntax restriction of orderby operator

* enhance #74:add errOrderByValueType

* enhance #85:builder supports uppercase operators (#86)

* enhance #74: builder relax the syntax restriction of orderby operator

* enhance #74:add errOrderByValueType

update module name

fix bug