Changes
- checkers: mark more checkers as stable @quasilyte (#956)
Checkers that are now considered to be stable:
* argOrder
* badCall
* badCond
* codegenComment
* commentFormatting
* deprecatedComment
* exitAfterDefer
* flagName
* mapKey
* newDeref
* offBy1
* stringXbytes
* valSwap
* wrapperFunc
Every checker from this list was tested on several big Go projects.