[WIP] Get build

[roc]

Problem

210

We need a method to check if a build exists, in order to avoid e.g. re-uploading builds for comparison in CI jobs. If a build has already been uploaded, no need to do so again. This will also avoid issues relating to duplicate primary keys when rebuilding.

Solution

This is totally WIP but here I'm adding a method that should simply call through to the server:read method for checking builds.

TODO

• [x] 🤓 Add & update tests (always try to increase test coverage)
• [x] 🔬 Ensure CI is passing (yarn lint:ci, yarn test, yarn tsc:ci)
• [ ] 📖 Update relevant documentation
• [x] 🕵️‍♀️ Check relevant internals are being called by method
• [x] 💻 Update CLI to include get-build method

[codecov-io]

Codecov Report

Merging #212 into master will decrease coverage by 0.10%. The diff coverage is 93.10%.

@@            Coverage Diff             @@
##           master     #212      +/-   ##
==========================================
- Coverage   96.95%   96.84%   -0.11%     
==========================================
  Files         122      123       +1     
  Lines        3020     3045      +25     
  Branches      541      495      -46     
==========================================
+ Hits         2928     2949      +21     
- Misses         88       93       +5     
+ Partials        4        3       -1     

Impacted Files	Coverage Δ
src/api-client/src/modules/get-build.ts	93.10% <93.10%> (ø)
plugins/with-mysql/src/setup.ts	66.66% <0.00%> (-8.34%)	:arrow_down:
src/comparator/src/BuildDelta.ts	95.06% <0.00%> (-0.24%)	:arrow_down:
plugins/with-mariadb/src/setup.ts	100.00% <0.00%> (ø)
plugins/with-postgres/src/setup.ts	100.00% <0.00%> (ø)
src/api-client/src/modules/spawn.ts	100.00% <0.00%> (ø)
src/cli/src/commands/upload-build.ts	42.85% <0.00%> (ø)
src/comparator/src/index.ts	99.60% <0.00%> (+0.39%)	:arrow_up: