* import bats for cli test

  https://github.com/sstephenson/bats

* add simple test case for cli use bats

* format main.bats add env

* replace main_test.sh with main.bats

  make explain suggestion sorted
  make index suggestion sorted

* add test database world_x

* update bats golden result

* make docker add 180s timeout

  1. add timeout for docker start
  2. add not explain able sql test case into explain_test.go

* explain info Using index VS Using index condition

  remove nonappearence key from explain extra info

* add timeout for test

* fix #178  JSON datatype only support utf8mb4 now

* splitstatement support optimizer hint

  https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html
  https://dev.mysql.com/doc/refman/8.0/en/comments.html

* vendor daily update

* format explain suggestion content

  1. update vendor
  2. `use db` can't be explain, it will print err log at explain.go

  RemoveSQLComment trim space

  1. go version move into Makefile
  2. add golden test for ast
  3. explainAbleSQL use tidb parser also

  remove bom before auditing

  1. fix -config arg parse bug
  2. code & comment lint

  #47 pretty print function `format` endless loop
  #37 -report-type not in (markdown, html) will not print score