Boost 1.80.0 Standalone

What's Changed

• Fix logic error in roots.hpp by @jzmaddock in #777
• Minor 1F1 bug fixes. by @jzmaddock in #778
• Add further color map example by @jzmaddock in #774
• Fix repeated name in example/policy_eg_1.cpp by @WarrenWeckesser in #780
• Fix for issue 773 by @mborland in #782
• Logpdf support by @mborland in #762
• Redeclaration of max_factorial value by @ckormanyos in #784
• Chatterjee Correlation Coefficient by @mborland in #770
• Constexpr fma by @mborland in #734
• Set BOOST_NO_EXCEPTIONS and BOOST_NO_RTTI for GCC and math in standal… by @jzmaddock in #786
• Bump minimum language standard to C++14 by @mborland in #788
• Move all GCC-5/6 testing to drone. by @jzmaddock in #790
• Try and consolidate more Github tests. by @jzmaddock in #791
• Replace non-UTF-8 copyright character by @jwakely in #792

New Contributors

• @WarrenWeckesser made their first contribution in #780
• @jwakely made their first contribution in #792

Full Changelog: boost-1.79.0...boost-1.80.0