Rebuilt for IMA sigs, glibc 2.34, aarch64 flags

Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937

Verify source with new strong signatures from upstream

Working (but weak, dependent on SHA1) source signature verification
Added API/ABI version to descriptions

Fix typo %{_?isa} for %{?_isa} in virtual Provides
Tidy up BR’s, including dropping make

Update comments based on the new plan for the version 1.16 API/ABI

Prepare for future upgrade to API/ABI version 1.16 by introducing virtual

Switch from autotools to meson; enable the tests, since the meson build system
Install examples in the -doc subpackage

Restore removal of pre-built documentation with its minified JS bundle

Update to 1.14.2; this adds new APIs, but is ABI-backwards-compatible

Update to 1.12.2

Switch URLs from HTTP to HTTPS
Rough out code to verify source tarball signatures, and document why we

Spec file style tweaks
Macro-ize documentation path in description
Simplified summaries and descriptions
Use make macros (https://src.fedoraproject.org/rpms/cairomm/pull-request/1)
Drop obsolete %ldconfig_scriptlets macro
Much stricter file globs, including so-version
Stop requiring the base package from the -doc package
Migrate top-level text file documentation to the -doc subpackage
BR mm-common; at minimum, this lets us find tags for libstdc++ documentation;
docs from the -doc subpackage, since we are now able to
Remove bundled jQuery/jQueryUI from prebuilt documentation, and rebuild the
Add a note explaining why we cannot run the tests
Drop explicit/manual lib Requires on cairo/libsigc++20
Drop version requirements in BRs
Rebuild autotools-generated files

Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild