chore: drop go1.14 support

[ubogdan]

Describe the PR

• drop go1.14 support
• fix dependecy issue

Relation issue
swaggo/swag#1126

Additional context
None

[codecov]

Codecov Report

Merging #58 (6981e22) into master (84c2fb3) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #58   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           73        73           
=========================================
  Hits            73        73           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 84c2fb3...6981e22. Read the comment docs.