Add rust toolchain to version/api.ts

lib/modules/versioning/api.ts

@@ -32,6 +32,7 @@ import * as regex from './regex';
 import * as rez from './rez';
 import * as rpm from './rpm';
 import * as ruby from './ruby';
+import * as rustToolchain from './rust-toolchain';
 import * as sameMajor from './same-major';
 import * as semver from './semver';
 import * as semverCoerced from './semver-coerced';
@@ -77,6 +78,7 @@ api.set(regex.id, regex.api);
 api.set(rez.id, rez.api);
 api.set(rpm.id, rpm.api);
 api.set(ruby.id, ruby.api);
+api.set(rustToolchain.id, rustToolchain.api);
 api.set(sameMajor.id, sameMajor.api);
 api.set(semver.id, semver.api);
 api.set(semverCoerced.id, semverCoerced.api);