* Add test to recreate the issue
* Improve test, add some documentation
* Improve test
* Add explicit nullable flag to column
* Set nullability explicitly on MySQL to deal with timestamp edge case
* Use same assertion for everything
* feat(query-builder): add hookContext for wrapIdentifier
* refactor: use isUndefined
* test(transaction): test passing of hookContext
* feat(runnner): pass context to postProcessResponse
* test(runner): test postProcessResponse for raw responses
* test(raw): test passing of hookContext
* feat: add hookContext to Raw and SchemaBuilder
* test(transaction): fix test for hookContext
* chore: fix lint error
* fix: check for hookContext before calling it
* test(transaction): fix hookContext test
* chore: remove whitespace
* test(hookContext): test cloning of context object
* refactor: hookContext -> queryContext
* minor: use more descriptive variable name
i.e. refactor: `context` => `queryContext`
* fix: remove unnecessary checks for query builder
* fix(Raw): pass query builder to formatter
* fix(SchemaCompiler): pass schema builder to formatter
* refactor: add addQueryContext helper
* feat: add queryContext to TableBuilder and ColumnBuilder
* fix(TableCompiler): pass table builder to formatter
* fix(ColumnCompiler): pass column builder to formatter
* fix(pushQuery): fix passing builder to formatter
* test(Schema|Table|ColumnCompiler): test passing queryContext
* fix(SchemaCompiler): pass queryContext to TableCompiler
* fix(TableCompiler): pass queryContext to ColumnCompiler
* test: add queryContext tests for all schema dialects
* test(TableCompiler): test overwriting queryContext from SchemaCompiler
* test(Raw): test passing queryContext to wrapIdentifier
* tests: run all the tests
* Added support for altering columns
* Add mysql dialect key for alter (modify)
* Added tests for .alter()
* Updated dialects for .alter() on column
* .alter() for mssql and tests
* Added an error for sqlite3 alter column
Sqlite does not support alter column at all
* Implemented schema alter column support for postgresql
* Added unit test for alter column and fixed postgres implementation
* Add test case for adding multiple columns at once (oracle check)
* Try upgrading CI mysql / postgres and distro
* Disabled adding multiple columns test from oracle
* Fixed node 0.12 test compatibility
* Fixed review comments
Only left alone ones in `test/tape/transactions.js` which would just
cause unnecessary conflicts and get cleaned up by separate pull
request #1257 anyway.
