Removed extension integration errors about mismatched Swift version / platform

[Sources] reset --hard rather than git pull

`pod repo push` now accepts the `--swift-version` argument.

Add aggregated search paths targets to vendored build settings

Fix #5512

Fix default LD_RUNPATH_SEARCH_PATHS for host targets

Output Swift targets when multiple versions of Swift are detected.

[FileAccessor] Sort vendored_framework_headers in tests

[Command::Update] Update docs for --sources

Fix cross-project framework dependencies

Fix whitespace in changelog

Update Issue Template

[update] adding --sources to specify to only update pods from a repo

[Command] Raise when using git < 1.8.5