fix: import(reflect-metadata) wasn't actually importing the types (microsoft#19)

Author: jamarzka

.gitignore

@@ -59,4 +59,3 @@ typings/
 
 # Compiled output
 dist/
-*.d.ts

src/decorators.ts

@@ -1,5 +1,3 @@
-import("reflect-metadata");
-
 import {INJECTION_TOKEN_METADATA_KEY, getParamInfo} from "./reflection-helpers";
 import {InjectionToken, Provider} from "./providers";
 import {RegistrationOptions, constructor} from "./types";

src/reflect-metadata.d.ts

@@ -0,0 +1 @@
+import "reflect-metadata";