enable piped argument on function calls (#233)

src/parsers/pipe.parser.ts

@@ -9,7 +9,8 @@ import {
 	Binary,
 	LiteralMap,
 	LiteralArray,
-	Interpolation
+	Interpolation,
+	MethodCall
 } from '@angular/compiler';
 
 import { ParserInterface } from './parser.interface';
@@ -131,6 +132,10 @@ export class PipeParser implements ParserInterface {
 			return this.getTranslatablesFromAsts(ast.expressions);
 		}
 
+		if (ast instanceof MethodCall) {
+			return this.getTranslatablesFromAsts(ast.args);
+		}
+
 		return [];
 	}