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]

Codecov Report

Merging #574 into master will increase coverage by 7.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #574      +/-   ##
==========================================
+ Coverage   87.95%   95.17%   +7.22%     
==========================================
  Files          32       33       +1     
  Lines        2109     2821     +712     
==========================================
+ Hits         1855     2685     +830     
+ Misses        254      136     -118

Impacted Files	Coverage Δ
src/balanced_tree.jl	96.19% <0%> (-1.44%)	⬇️
src/heaps/binary_heap.jl	100% <0%> (ø)	⬆️
src/dict_support.jl	100% <0%> (ø)	⬆️
src/list.jl	100% <0%> (ø)	⬆️
src/int_set.jl	100% <0%> (ø)	⬆️
src/fenwick.jl	100% <0%> (ø)	⬆️
src/circular_buffer.jl	100% <0%> (ø)	⬆️
src/circ_deque.jl	100% <0%> (ø)	⬆️
src/DataStructures.jl	100% <0%> (ø)
src/trie.jl	91.22% <0%> (+0.31%)	⬆️
... and 20 more

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