Non-deterministic ordering of `@supports` conditions

[lucacasonato]

Just had this failure locally while running cargo test:

failures:

---- bundler::tests::test_bundle stdout ----
thread 'bundler::tests::test_bundle' panicked at 'assertion failed: `(left == right)`
  left: `"@supports ((foo: bar) or (color: red)) {\n  .b {\n    color: green;\n  }\n}\n\n.a {\n  color: red;\n}\n"`,
 right: `"@supports ((color: red) or (foo: bar)) {\n  .b {\n    color: green;\n  }\n}\n\n.a {\n  color: red;\n}\n"`', src/bundler.rs:685:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    bundler::tests::test_bundle

test result: FAILED. 76 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s

It seems to have occurred because the sort order of the @supports conditions is not deterministic.

[devongovett]

Yeah I think it happens due to multi-threading. Probably should sort the results when combining @supports and @media queries.