builtin: Add zig_version

This will enable code to perform version checks and make it easier to
support multiple versions of Zig.

Within the SemVer implementation, an intermediate value needed to be
coerced to a slice to workaround a comptime bug.

Closes #6466
a0ad2dee6aJay Petacat committed on 1/9/2021, 8:50:39 PM· committed by Andrew Kelleyparent5c49a13
2 files changedLine totals unavailable