Boost.Multiprecision 1.88 Standalone

What's Changed

• Make float128 a trivially copyable type by @nmnobre in #636
• Make __float128 a floating point type. by @jzmaddock in #637
• Merge to Master for 1.87 by @mborland in #642
• Disable check for __float128 on PGI compiler by @mborland in #641
• Add bug fix for PGI compiler to 1.87 by @mborland in #643
• GHA: Use node 20 actions by @Flamefire in #645
• Try and optimize small integer powers. by @jzmaddock in #649
• Fix some gcc-13 warnings. by @jzmaddock in #650
• Suppress warnings caused by use of -Wswitch_default on GCC by @jzmaddock in #651
• fix the mpfr stack str bug of the deadloop in the while by @FAKERINHEART in #657
• Add #657 to master for 1.88 by @mborland in #659
• Suppress warnings caused by -Wimplicit-fallthrough by @koct9i in #660
• Don't use deprecated form of user-defined literal operator by @Thomas-Barbier-1A in #663
• Don't use deprecated form of user-defined literal operator around BOOST_JOIN by @Romain-Geissler-1A in #665
• Merge fix for user-defined literal operator to 1.88 by @mborland in #664

New Contributors

• @nmnobre made their first contribution in #636
• @Flamefire made their first contribution in #645
• @FAKERINHEART made their first contribution in #657
• @koct9i made their first contribution in #660
• @Thomas-Barbier-1A made their first contribution in #663

Full Changelog: Boost_1_86_0...Boost_1_88_0