1.1.0m: Merge #1: Merge changes from upstream

1f8503024608efa0acd30666e522fcbb5a1730a8 Add support for ARM64 darwin (#43) (Harry Mallon)
3bb959c9825decefb66891bf96691833a91e88a2 Remove unnecessary reinterpret_cast (#42) (rtobar)
2e97ab26b1321b655d29c5d1d4b9e9055ff7543f Fix (unused) ReadUint64LE for BE machines (#41) (Pieter Wuille)
47b40d220949c5b013d49c1179643334196ec5a9 Bump dependencies. (#40) (Victor Costan)
ba741856254e3c6f6c7bcf0704fe1344a668a227 Move CI to Visual Studio 2019. (Victor Costan)
efa301a7e5e8ee2bfa65473c522d3d1c2c6ed770 Allow different C/C++ standards when this is used as a subproject. (Victor Costan)
cc6d71465ee29660571cee3e61c35509cf9e5c04 CMake: Use configure_package_config_file() (Paweł Bylica)

Pull request description:

  This brings the bitcoin-fork branch up to date with all the changes in google's master branch.

ACKs for top commit:
  MarcoFalke:
    ACK 9e7f5124308351a541d4f4fc1119069c73ad8073

Tree-SHA512: 5b2ce0a1ea4da6262aaf6829d599a935f4a492574f70ff2f20d9cddba89137ce37986a9f4e1c586cba8657ea2bdbff738062ba3c2eb7ee44742464032f492a74