fix(publisher-electron-release-server): omit RELEASES file when uploading assets

[monsterkrampe]

closes: #1873

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• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:
The RELEASES file is now filtered out from the artifacts and thus not send to electron release server.

[codecov]

Codecov Report

Merging #2089 (45f523f) into master (286f96a) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #2089      +/-   ##
==========================================
- Coverage   72.71%   72.64%   -0.07%     
==========================================
  Files          74       74              
  Lines        2221     2223       +2     
  Branches      420      420              
==========================================
  Hits         1615     1615              
- Misses        446      448       +2     
  Partials      160      160              

Impacted Files	Coverage Δ
...lisher/electron-release-server/src/PublisherERS.ts	26.47% <0.00%> (-0.81%)	⬇️

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[monsterkrampe]

As for #2088, I think that the coverage is not a real issue here.

[nullxx]

I am having the same issue. If this is not fixed, It will never work on Windows.

[monsterkrampe]

@nullxx If you need this fix right away, you can still try to use the modified version of the package within your project for example by putting it into a private NPM registry. This is also what I ended up doing for now since I do not know if and when this PR will be merged.

[nullxx]

I know, I made it, but with other approach. #2220

[monsterkrampe]

This also looks interesting.
We probably should discuss which solution to prefer. In particular, I would be interested what the repo owners think about that.
Being able to configure which files to publish certainly would not hurt anyway.

@malept could you give some feedback on any of the PRs regarding this issue? :)