feat: Inject global.SENTRY_RELEASE.id into source

[HazAT]

This is a breaking change, we no longer support compilation hash for now since this would conflict with code injection.

Basically what we do is, we inject

global.SENTRY_RELEASE={};
global.SENTRY_RELEASE.id="#MYHASH#";

into the webpack bundle.

Old comment

So I am not really happy with how this works right now.

I wasn't able to inject code during compilation into the source, how it's working now is:

Before compilation I add a fake module to the source containing

global.SENTRY_RELEASE={};
global.SENTRY_RELEASE.id="";

After compilation I iterate over all chunks, and replace the corresponding code on the file system so the result in the compiled file is:

global.SENTRY_RELEASE={};
global.SENTRY_RELEASE.id="#MYHASH#";

I will gladly take advice on how to make it better.

[codecov-io]

Codecov Report

Merging #20 into master will decrease coverage by 28.71%.
The diff coverage is 39.13%.

@@             Coverage Diff             @@
##           master      #20       +/-   ##
===========================================
- Coverage   96.15%   67.44%   -28.72%     
===========================================
  Files           1        1               
  Lines          26       43       +17     
  Branches        3        6        +3     
===========================================
+ Hits           25       29        +4     
- Misses          1       11       +10     
- Partials        0        3        +3

Impacted Files	Coverage Δ
src/index.js	67.44% <39.13%> (-28.72%)	⬇️

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