Version 3.11.0

@lemire

What's Changed

adding missing undef silencer by @lemire in #2253
Ignore pragma once when amalgamating source files by @tobil4sk in #2248
enable BMI2, but only when LLVM is the compiler by @lemire in #2255
deps: switch to CPM by @lemire in #2257
Make document::is_null behavior consistent with documentation by @tobil4sk in #2258
documentation for issue 2259 (clarifying) by @lemire in #2260
fixes issue 2271 (documentation bug) by @lemire in #2273
Jsonpath by @lemire in #2272
documentation for threading... by @lemire in #2277
C++20 deserialization features by @lemire in #2276
adding pad function by @lemire in #2283
prevent int to pointer implicit conversion for operator[](const char *) by @lemire in #2286
fix: processor checks inconsistently problem by @halx99 in #2299

Full Changelog: v3.10.1...v3.11.0