add some babel stuff

node_modules/@babel/traverse/lib/scope/binding.js

@@ -0,0 +1,73 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var Binding = function () {
+  function Binding(_ref) {
+    var identifier = _ref.identifier,
+        scope = _ref.scope,
+        path = _ref.path,
+        kind = _ref.kind;
+    this.identifier = identifier;
+    this.scope = scope;
+    this.path = path;
+    this.kind = kind;
+    this.constantViolations = [];
+    this.constant = true;
+    this.referencePaths = [];
+    this.referenced = false;
+    this.references = 0;
+    this.clearValue();
+  }
+
+  var _proto = Binding.prototype;
+
+  _proto.deoptValue = function deoptValue() {
+    this.clearValue();
+    this.hasDeoptedValue = true;
+  };
+
+  _proto.setValue = function setValue(value) {
+    if (this.hasDeoptedValue) return;
+    this.hasValue = true;
+    this.value = value;
+  };
+
+  _proto.clearValue = function clearValue() {
+    this.hasDeoptedValue = false;
+    this.hasValue = false;
+    this.value = null;
+  };
+
+  _proto.reassign = function reassign(path) {
+    this.constant = false;
+
+    if (this.constantViolations.indexOf(path) !== -1) {
+      return;
+    }
+
+    this.constantViolations.push(path);
+  };
+
+  _proto.reference = function reference(path) {
+    if (this.referencePaths.indexOf(path) !== -1) {
+      return;
+    }
+
+    this.referenced = true;
+    this.references++;
+    this.referencePaths.push(path);
+  };
+
+  _proto.dereference = function dereference() {
+    this.references--;
+    this.referenced = !!this.references;
+  };
+
+  return Binding;
+}();
+
+exports.default = Binding;