CI: fails to install semverver on travis' macOS/Windows builders

[JohnTitor]

E.g. this one:

+'[' -n '' ']'
+case "${TRAVIS_OS_NAME}" in
+'[' osx = windows ']'
+mkdir -p /Users/travis/rust/cargo/bin
+cp target/debug/cargo-semver /Users/travis/rust/cargo/bin
+cp target/debug/rust-semverver /Users/travis/rust/cargo/bin
++mktemp -d
+cargo install --root /var/folders/17/5mc7816d3mndxjqgplq6057w0000gn/T/tmp.dkTfxD4S semverver
No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.

Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received

The build has been terminated

I guess it's a platform-dependent failure though I'm totally not sure. Therefore we currently only check on Linux but it'd be great if we could resolve this by migrating CI or something else.

[JohnTitor]

Now we've migrated to GHA and this doesn't seem to be an issue anymore, closing.