fix: check more pages of tags

[bcoe]

The GitHub API returns tags alphabetically, rather than chronologically, this means that in mono-repos we will potentially not find a tag if there have been more than 600 releases.

As a more permanent fix for this, I believe we should check both releases and tags, but this is a good start.

[codecov]

Codecov Report

Merging #92 (fcc6cf3) into master (e2686d1) will increase coverage by 2.82%.
The diff coverage is 87.21%.

@@            Coverage Diff             @@
##           master      #92      +/-   ##
==========================================
+ Coverage   29.03%   31.86%   +2.82%     
==========================================
  Files          18       19       +1     
  Lines        2228     2335     +107     
  Branches      105      126      +21     
==========================================
+ Hits          647      744      +97     
- Misses       1581     1591      +10     

Impacted Files	Coverage Δ
src/server.ts	0.00% <0.00%> (ø)
src/lib/datastore.ts	30.88% <25.00%> (+0.02%)	⬆️
src/lib/packument.ts	47.85% <72.72%> (+1.40%)	⬆️
src/lib/write-package.ts	75.30% <90.90%> (+2.01%)	⬆️
src/lib/github.ts	67.77% <100.00%> (+5.77%)	⬆️
src/routes/put-delete-version.ts	100.00% <100.00%> (ø)

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