docs: Prepare for v0.4.2 release (#224)

docs: Prepare for v0.4.1 release (#221)

ci: Use different names for build logs

docs: Add CHANGELOG entry for v0.3.9 (#206)

docs: Add CHANGELOG entry for v0.3.8 (#201)

docs: Add CHANGELOG entry for v0.3.7 (#191)

docs: Add CHANGELOG entry for v0.3.6 (#188)

docs: Add CHANGELOG entry for v0.3.5 (#185)

build: Use platform constraints in gem builds (#179)

ci: Use Ubuntu 20.04 and macOS 12 in CI (#174)