style: make eslint check .ts files

package.json

@@ -11,7 +11,7 @@
   },
   "types": "dist/liquid.d.ts",
   "scripts": {
-    "lint": "eslint .",
+    "lint": "eslint '**/*.ts' .",
     "check": "npm test && npm run lint",
     "unit": "mocha \"test/unit/**/*.ts\"",
     "integration": "mocha \"test/integration/**/*.ts\"",

rollup.config.ts

@@ -57,7 +57,6 @@ const nodeEsm = {
   input
 }
 
-
 const browserEsm = {
   output: [{
     file: 'dist/liquid.browser.esm.js',

src/render/expression.ts

@@ -19,7 +19,7 @@ export class Expression {
   private postfix: Token[]
   private lenient: boolean
 
-  public constructor (str: string, lenient: boolean = false) {
+  public constructor (str: string, lenient = false) {
     const tokenizer = new Tokenizer(str)
     this.postfix = [...toPostfix(tokenizer.readExpression())]
     this.lenient = lenient
@@ -32,7 +32,7 @@ export class Expression {
         const result = evalOperatorToken(token, l, r, ctx)
         this.operands.push(result)
       } else {
-        this.operands.push(evalToken(token, ctx, this.lenient && this.postfix.length == 1))
+        this.operands.push(evalToken(token, ctx, this.lenient && this.postfix.length === 1))
       }
     }
     return this.operands[0]
@@ -42,7 +42,7 @@ export class Expression {
   }
 }
 
-export function evalToken (token: Token | undefined, ctx: Context, lenient: boolean = false): any {
+export function evalToken (token: Token | undefined, ctx: Context, lenient = false): any {
   assert(ctx, () => 'unable to evaluate: context not defined')
   if (TypeGuards.isPropertyAccessToken(token)) {
     const variable = token.getVariableAsText()

src/render/operator.ts

@@ -3,7 +3,6 @@ import { Context } from '../context/context'
 import { isFunction } from '../util/underscore'
 import { isTruthy } from '../render/boolean'
 
-
 export const operatorImpls: {[key: string]: (lhs: any, rhs: any, ctx: Context) => boolean} = {
   '==': (l: any, r: any) => {
     if (isComparable(l)) return l.equals(r)