WASM backend does not compile because the Allocator function has changed

[TapioT]

Compiling with

zig build-exe --pkg-beign zgt src/main.zig --pkg-end -target wasm32-freestanding examples/demo.zig

fails with error `expected type '*std.mem,Allocator', found 'std.mem.Allocator'

This seems to be a result of Allocgate

[TapioT]

Created pull request to fix this:

5