chore: fix linting

src/util/error.ts

@@ -1,5 +1,4 @@
 import * as _ from './underscore'
-import { __extends } from 'tslib'
 import Token from 'src/parser/token'
 import ITemplate from 'src/template/itemplate'
 
@@ -11,7 +10,7 @@ abstract class LiquidError extends Error {
     this.originalError = err
     this.token = token
   }
-  protected update() {
+  protected update () {
     const err = this.originalError
     const context = mkContext(this.token)
     this.message = mkMessage(err.message, this.token)

src/util/promise.ts

@@ -5,8 +5,8 @@
  * The iteratee is invoked with three arguments: (value, index, iterable).
  */
 export function mapSeries<T1, T2> (
-    iterable: T1[],
-    iteratee: (item: T1, idx: number, iterable: T1[]) => Promise<T2> | T2
+  iterable: T1[],
+  iteratee: (item: T1, idx: number, iterable: T1[]) => Promise<T2> | T2
 ): Promise<T2[]> {
   let ret = Promise.resolve(0)
   const result: T2[] = []

src/util/strftime.ts

@@ -179,6 +179,6 @@ export default function (d: Date, format: string) {
     // Add the format code
     const ch = results[0].charAt(1)
     const func = formatCodes[ch]
-    output += func ? func.call(null, d) : '%' + ch
+    output += func ? func(d) : '%' + ch
   }
 }

src/util/underscore.ts

@@ -77,10 +77,10 @@ export function isError (value: any): boolean {
  * @param {Function} iteratee The function invoked per iteration.
  * @return {Object} Returns object.
  */
-export function forOwn <T>(
+export function forOwn <T> (
   object: {[key: string]: T} | undefined,
   iteratee: ((val: T, key: string, obj: {[key: string]: T}) => boolean | void)
-  ) {
+) {
   object = object || {}
   for (const k in object) {
     if (object.hasOwnProperty(k)) {