* Fix wrong type on hooktask to convert typ from char(16) to varchar(16)
* Fix bugs
* Improve code
* Use different trim function for MSSQL
* Fix bug
* Removed wrong changed line
* Removed wrong changed line
* Fix nullable
* Fix lint
* Ignore sqlite on migration
* Fix mssql modify column failure
* Move modifyColumn to migrations.go so that other migrate function could use it
Lunny Xiao