[Draft] Medium and long text support for mysql

[darkdef]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	✔️
Fixed issues	#2

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (add9679) 99.08% compared to head (e2b8528) 99.08%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #228   +/-   ##
=========================================
  Coverage     99.08%   99.08%           
  Complexity      186      186           
=========================================
  Files            13       13           
  Lines           548      548           
=========================================
  Hits            543      543           
  Misses            5        5           

Impacted Files	Coverage Δ
src/QueryBuilder.php	100.00% <ø> (ø)
src/Schema.php	99.60% <ø> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[darkdef]

Now it's draft. Need add recognize leghth for tiny, medum, long and other types of text for mysql only

[darkdef]

Need other solution base on length of TYPE_TEXT
Without crutches. Need refactoring - \Yiisoft\Db\QueryBuilder\AbstractQueryBuilder::getColumnType

For information:
yiisoft/yii2#9585
https://dev.mysql.com/doc/refman/8.0/en/storage-requirements.html
https://github.com/nkovacs/yii2-mysql/blob/master/Schema.php