Feature: Caches dependencies when building

[sandresen1]

On every build, caching should take place to store the pip dependencies so they don't need to be reinstalled each time upon building.

[codecov]

Codecov Report

Merging #1047 (d153187) into develop (656045a) will increase coverage by 0.08%.
Report is 1 commits behind head on develop.
The diff coverage is n/a.

❗ Current head d153187 differs from pull request most recent head faad37b. Consider uploading reports for the commit faad37b to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1047      +/-   ##
===========================================
+ Coverage    63.65%   63.73%   +0.08%     
===========================================
  Files           45       45              
  Lines         4997     4997              
===========================================
+ Hits          3181     3185       +4     
+ Misses        1816     1812       -4     

see 1 file with indirect coverage changes

[sandresen1]

Caching seems to work fine and will only install a package if specified in the toml file. But the time taken to retrieve from cache seems to be the same as downloading :(