Bump to v3.0.0.

internal/baseCopy.js

@@ -0,0 +1,25 @@
+/**
+ * Copies the properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @param {Array} props The property names to copy.
+ * @returns {Object} Returns `object`.
+ */
+function baseCopy(source, object, props) {
+  if (!props) {
+    props = object;
+    object = {};
+  }
+  var index = -1,
+      length = props.length;
+
+  while (++index < length) {
+    var key = props[index];
+    object[key] = source[key];
+  }
+  return object;
+}
+
+export default baseCopy;