Release v31.0.0

What's Changed

• Teach qml_cache macro how to handle spaces by @kyrios123 in #7
• Add optional linker flag icf={safe,all} to optimizations by @joebonrichie in #20
• Export environmental variables for pgo_gen and pgo_use build contexts by @joebonrichie in #21
• Ensure LTO for GCC runs in parallel by @joebonrichie in #9
• Remove deprecated meson macros by @joebonrichie in #25
• Adjust width-param so ybump doesn't set summary to 80 cols by @Staudey in #8
• Implement sccache by @GZGavinZhao in #26
• Profile instrumentation flags must also be added to LDFLAGS by @joebonrichie in #10
• Adjust python macros for PEP 517 by @joebonrichie in #24
• Allow for renaming of simple source files by @JacekJagosz in #29
• Switch to IR based instrumentation for clang PGO builds
• Add experimental BOLT macros
• Add python3_avx2_lib_shift macro for experimental python avx2 lib support by @joebonrichie in #19
• Add manpage compression by @EbonJaeger in #31

New Contributors

• @joebonrichie made their first contribution in #19
• @GZGavinZhao made their first contribution in #26
• @JacekJagosz made their first contribution in #29
• @EbonJaeger made their first contribution in #31

Full Changelog: v30...v31