ESLint: Enforce array destructuring

This is a follow-up to #237

.eslintrc.js

@@ -248,7 +248,7 @@ module.exports = {
         "prefer-destructuring": [
             "error",
             {
-                "array": false,
+                "array": true,
                 "object": true
             }
         ],

src/xregexp.js

@@ -602,7 +602,7 @@ function XRegExp(pattern, flags) {
                 pos += (result.matchLength || 1);
             } else {
                 // Get the native token at the current position
-                const token = XRegExp.exec(appliedPattern, nativeTokens[scope], pos, 'sticky')[0];
+                const [token] = XRegExp.exec(appliedPattern, nativeTokens[scope], pos, 'sticky');
                 output += token;
                 pos += token.length;
                 if (token === '[' && scope === defaultScope) {
@@ -1525,7 +1525,7 @@ fixed.replace = function(search, replacement) {
                     // Change the `args[0]` string primitive to a `String` object that can store
                     // properties. This really does need to use `String` as a constructor
                     args[0] = new String(args[0]);
-                    groupsObject = args[0];
+                    [groupsObject] = args;
                 }
 
                 // Store named backreferences

tools/scripts/utils.js

@@ -80,8 +80,8 @@ const createBmpRange = (r, {addBrackets} = {addBrackets: true}) => {
     if (r.length === 0) {return '';}
 
     const buf = [];
-    let start = r[0];
-    let end = r[0];
+    let [start] = r;
+    let [end] = r;
     let predict = start + 1;
     r = r.slice(1);