Update esutils version

Author: Constellation

escodegen.js

@@ -469,7 +469,7 @@
             } else if (esutils.code.isLineTerminator(code) || code === 0x5C  /* \ */) {
                 result += escapeDisallowedCharacter(code);
                 continue;
-            } else if (!esutils.code.isIdentifierPart(code) && (json && code < 0x20  /* SP */ || !json && !escapeless && (code < 0x20  /* SP */ || code > 0x7E  /* ~ */))) {
+            } else if (!esutils.code.isIdentifierPartES5(code) && (json && code < 0x20  /* SP */ || !json && !escapeless && (code < 0x20  /* SP */ || code > 0x7E  /* ~ */))) {
                 result += escapeAllowedCharacter(code, str.charCodeAt(i + 1));
                 continue;
             }
@@ -561,7 +561,7 @@
         rightCharCode = rightSource.charCodeAt(0);
 
         if ((leftCharCode === 0x2B  /* + */ || leftCharCode === 0x2D  /* - */) && leftCharCode === rightCharCode ||
-            esutils.code.isIdentifierPart(leftCharCode) && esutils.code.isIdentifierPart(rightCharCode) ||
+            esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode) ||
             leftCharCode === 0x2F  /* / */ && rightCharCode === 0x69  /* i */) { // infix word operators all start with `i`
             return [left, noEmptySpace(), right];
         } else if (esutils.code.isWhiteSpace(leftCharCode) || esutils.code.isLineTerminator(leftCharCode) ||
@@ -1825,7 +1825,7 @@
 
             leftSource = fragment.toString();
 
-            if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPart(expr.operator.charCodeAt(0))) {
+            if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPartES5(expr.operator.charCodeAt(0))) {
                 result = [fragment, noEmptySpace(), expr.operator];
             } else {
                 result = join(fragment, expr.operator);
@@ -1949,7 +1949,7 @@
                     rightCharCode = fragment.toString().charCodeAt(0);
 
                     if (((leftCharCode === 0x2B  /* + */ || leftCharCode === 0x2D  /* - */) && leftCharCode === rightCharCode) ||
-                            (esutils.code.isIdentifierPart(leftCharCode) && esutils.code.isIdentifierPart(rightCharCode))) {
+                            (esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode))) {
                         result.push(noEmptySpace());
                         result.push(fragment);
                     } else {

package.json

@@ -32,7 +32,7 @@
     },
     "dependencies": {
         "estraverse": "^1.9.1",
-        "esutils": "^1.1.6",
+        "esutils": "^2.0.2",
         "esprima": "^1.2.2",
         "optionator": "^0.5.0"
     },