revert kotlin lib version

[HPNavjot]

162

Revert versions for:

• kotlin-lib
• jlleitschuh-ktlint
• gradle

[codecov-commenter]

Codecov Report

Merging #161 (69204ec) into master (5270b55) will decrease coverage by 0.27%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #161      +/-   ##
============================================
- Coverage     85.17%   84.91%   -0.27%     
- Complexity      502      543      +41     
============================================
  Files            75       75              
  Lines          1916     1916              
  Branches        257      260       +3     
============================================
- Hits           1632     1627       -5     
- Misses          158      159       +1     
- Partials        126      130       +4     

see 9 files with indirect coverage changes

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