Version 1.64.1
- The BigInt type is now _actually_ available, as it wasn't enabled in the
1.64.0 release even though it was mentioned in the release notes.
- Closed bugs and merge requests:
* testCommandLine's Unicode tests failing on Alpine Linux [Philip Chimento,
#296, !399]
* build: Various clean-ups [Jan Tojnar, !403]
* Correctly handle vfunc inout parameters [Marco Trevisan, !404]
* Fix failed redirect of output in CommandLine tests [Liban Parker, !409]