Support degenerate bitfields with fields of length 32 and 64 to match documented constraints.
Add unittests for bugs which seem to have been fixed over time.
the enum caused it to allocate needlessly. static immutable avoids that.
Merge pull request #1615 from adamdruppe/md_allocation

the enum caused it to allocate needlessly. static immutable avoids that.
Merge pull request #1613 from Safety0ff/master

Support degenerate bitfields with fields of length 32 and 64
fix Issue 11165 - std.typecons._d_toObject conflicts with std.signals._d_toObject
Merge pull request #1614 from 9rnsr/fix11165

[REG2.064a] Issue 11165 - std.typecons._d_toObject conflicts with std.signals._d_toObject