fix(UrlMatcher): implement hashCode
fix(UrlMatcher): implement hashCode

fixes #20

jakuub/route.dart,dart-archive/route.dart,jakuub/route.dart,ArcBees/route.dart,dart-archive/route.dart,dart-archive/route.dart,jakuub/route.dart,ArcBees/route.dart,jakuub/route.dart,dart-archive/route.dart,ArcBees/route.dart,ArcBees/route.dart