python37: updated to 3.7.4

Python 3.7.4 final

Core and Builtins
bpo-37500: Due to unintended side effects, revert the change introduced by bpo-1875 in 3.7.4rc1 to check for syntax errors in dead conditional code blocks.
Documentation
bpo-37149: Replace the dead link to the Tkinter 8.5 reference by John Shipman, New Mexico Tech, with a link to the archive.org copy.

Python 3.7.4 release candidate 2

Security
bpo-37463: ssl.match_hostname() no longer accepts IPv4 addresses with additional text after the address and only quad-dotted notation without trailing whitespaces. Some inet_aton() implementations ignore whitespace and all data after whitespace, e.g. ‘127.0.0.1 whatever’.

Core and Builtins
bpo-24214: Improved support of the surrogatepass error handler in the UTF-8 and UTF-16 incremental decoders.

Library
bpo-37440: http.client now enables TLS 1.3 post-handshake authentication for default context or if a cert_file is passed to HTTPSConnection.
bpo-37437: Update vendorized expat version to 2.2.7.
bpo-37428: SSLContext.post_handshake_auth = True no longer sets SSL_VERIFY_POST_HANDSHAKE verify flag for client connections. Although the option is documented as ignored for clients, OpenSSL implicitly enables cert chain validation when the flag is set.
bpo-32627: Fix compile error when _uuid headers conflicting included.

Windows
bpo-37369: Fixes path for sys.executable when running from the Microsoft Store.
bpo-35360: Update Windows builds to use SQLite 3.28.0.

macOS
bpo-34602: Avoid test suite failures on macOS by no longer calling resource.setrlimit to increase the process stack size limit at runtime. The runtime change is no longer needed since the interpreter is being built with a larger default stack size.

(adam)