(test) add test

src/compilers/po.compiler.ts

@@ -29,7 +29,7 @@ export class PoCompiler implements CompilerInterface {
 						msgstr: collection.get(key)
 					};
 					return translations;
-				}, <any> {})
+				}, {} as any)
 			}
 		};
 

src/utils/translation.collection.ts

@@ -1,5 +1,5 @@
 export interface TranslationType {
-	[key: string]: string
+	[key: string]: string;
 }
 
 export class TranslationCollection {
@@ -18,7 +18,7 @@ export class TranslationCollection {
 		const values = keys.reduce((results, key) => {
 			results[key] = '';
 			return results;
-		}, <TranslationType> {});
+		}, {} as TranslationType);
 		return new TranslationCollection({ ...this.values, ...values });
 	}