refactor: strictly typed

src/parser/output-token.ts

@@ -1,8 +1,8 @@
 import DelimitedToken from './delimited-token'
 
 export default class OutputToken extends DelimitedToken {
-  constructor (raw, value, pos, input, file, line) {
-    super(raw, value, pos, input, file, line)
+  constructor (raw: string, value: string, input: string, line: number, pos: number, file?: string) {
+    super(raw, value, input, line, pos, file)
     this.type = 'output'
   }
 }