0367d31403
* CI: Fix CVE-2020-15228 in GitHub Actions Fixes the CVE-2020-15228 security issue in GitHub Actions: > `add-path` and `set-env` Runner commands are processed via stdout set-env was used twice, which is now replaced by >> $GITHUB_ENV - Issue: https://github.com/actions/toolkit/security/advisories/GHSA-mfwh-5m23-j46w - Solution: https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable) * CI: Specify installing libsigc++ v2.x in GitHub Actions Version 3 of libsigc++ was automatically installed. This commit fixates the version brew installs to 2.x. Should fix #6002 * CI: Use v2 checkout and upload-artifact actions Also replaces macos-10.15 with macos-latest as runner. Currently is references the same environment (macOS 10.15), but this way it will update to macOS 11.0 when it's ready and stable.