fix: invalid URL for runtime helpers

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

fixes #370

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #373 (03ac568) into master (002e2a1) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #373      +/-   ##
==========================================
- Coverage   97.81%   97.73%   -0.08%     
==========================================
  Files           7        7              
  Lines         548      529      -19     
  Branches      150      144       -6     
==========================================
- Hits          536      517      -19     
  Misses         12       12              

Impacted Files	Coverage Δ
src/plugins/sources-plugin.js	97.50% <100.00%> (ø)
src/utils.js	97.89% <100.00%> (-0.11%)	⬇️

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