Various fixes & improvements
- fix(sourcemaps): Correctly read files with debug_id and debugId (#2268) by @loewenheim
- build: Remove unused dependencies (#2255) by @szokeasaurusrex
- ref(proguard): Define environment variable name in constant (#2265) by @szokeasaurusrex
- ref(test): Remove redundant line (#2266) by @szokeasaurusrex
- fix(proguard): Wait until chunks are assembled (#2267) by @szokeasaurusrex