add retract to fix proxy cache caused by accidentally pushed tags

[Nerzal]

Describe the PR
Add retract statement to fix proxy.golang.org cache

Relation issue
#1561

Additional context
Accidentally pushed tags from wrong console window. The wrongfully pushed tags have already been deleted, but the goproxy cache already picked them up.
A new tag has already been published to fix fetching of the latest version for versions <v2.0.0

To retract a version, a module author should add a retract directive to go.mod, then publish a new version containing that directive. The new version must be higher than other release or pre-release versions; that is, the @latest [version query](https://go.dev/ref/mod#version-queries) should resolve to the new version before retractions are considered. The go command loads and applies retractions from the version shown by go list -m -retracted $modpath@latest (where $modpath is the module path).

https://go.dev/ref/mod#go-mod-file-retract

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (c14cc8e) 83.79% compared to head (38cc286) 83.79%.

❗ Current head 38cc286 differs from pull request most recent head 7c8a5f7. Consider uploading reports for the commit 7c8a5f7 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1562   +/-   ##
=======================================
  Coverage   83.79%   83.79%           
=======================================
  Files          19       19           
  Lines        3745     3745           
=======================================
  Hits         3138     3138           
  Misses        520      520           
  Partials       87       87           

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