Install TagBot as a GitHub Action

[JuliaTagBot]

You're receiving this pull request because the now-deprecated Julia TagBot GitHub App is installed for this repository. This pull request installs TagBot as a GitHub Action. If this PR does not belong in this repository for any reason, feel free to close it.

See this Discourse thread for more details and to ask questions. Please do not comment on this pull request, because it is unlikely that I (@christopher-dG) will see it.

[codecov-io]

Codecov Report

Merging #102 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #102   +/-   ##
======================================
  Coverage    96.6%   96.6%           
======================================
  Files          10      10           
  Lines        1412    1412           
======================================
  Hits         1364    1364           
  Misses         48      48

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