chore: update to Node.js LTS

src/build/base64-impl-browser.spec.ts

@@ -2,11 +2,6 @@ import * as base64 from './base64-impl-browser'
 import { JSDOM } from 'jsdom'
 
 describe('base64-impl/browser', function () {
-  if (+(process.version.match(/^v(\d+)/) as RegExpMatchArray)[1] < 8) {
-    console.info('jsdom not supported, skipping base64-impl-browser...')
-    return
-  }
-
   beforeEach(function () {
     const dom = new JSDOM(``, {
       url: 'https://example.com/',

src/build/fs-impl-browser.spec.ts

@@ -3,10 +3,6 @@ import * as sinon from 'sinon'
 import { JSDOM } from 'jsdom'
 
 describe('fs/browser', function () {
-  if (+(process.version.match(/^v(\d+)/) as RegExpMatchArray)[1] < 8) {
-    console.info('jsdom not supported, skipping template-browser...')
-    return
-  }
   beforeEach(function () {
     const dom = new JSDOM(``, {
       url: 'https://example.com/foo/bar/',

src/filters/array.ts

@@ -46,7 +46,7 @@ export function * sort_natural<T> (this: FilterImpl, arr: T[], property?: string
   return yield * sortBy.call(this, arr, property, caseInsensitiveCompare)
 }
 
-export const size = (v: string | any[]) => (v && v.length) || 0
+export const size = (v: string | any[]) => v?.length || 0
 
 export function * map (this: FilterImpl, arr: Scope[], property: string): IterableIterator<unknown> {
   const results = []

src/liquid-options.ts

@@ -204,11 +204,11 @@ export const defaultOptions: NormalizedFullOptions = {
 }
 
 export function normalize (options: LiquidOptions): NormalizedFullOptions {
-  if (options.hasOwnProperty('root')) {
-    if (!options.hasOwnProperty('partials')) options.partials = options.root
-    if (!options.hasOwnProperty('layouts')) options.layouts = options.root
+  if ('root' in options) {
+    if (!('partials' in options)) options.partials = options.root
+    if (!('layouts' in options)) options.layouts = options.root
   }
-  if (options.hasOwnProperty('cache')) {
+  if ('cache' in options) {
     let cache: LiquidCache | undefined
     if (typeof options.cache === 'number') cache = options.cache > 0 ? new LRU(options.cache) : undefined
     else if (typeof options.cache === 'object') cache = options.cache

src/util/underscore.ts

@@ -1,10 +1,9 @@
 import { Drop } from '../drop/drop'
 
 export const toString = Object.prototype.toString
+export const hasOwnProperty = Object.prototype.hasOwnProperty
 const toLowerCase = String.prototype.toLowerCase
 
-export const hasOwnProperty = Object.hasOwnProperty
-
 export function isString (value: any): value is string {
   return typeof value === 'string'
 }
@@ -90,8 +89,7 @@ export function isUndefined (value: any): boolean {
 }
 
 export function isArray (value: any): value is any[] {
-  // be compatible with IE 8
-  return toString.call(value) === '[object Array]'
+  return Array.isArray(value)
 }
 
 export function isArrayLike (value: any): value is any[] {