Bump to v3.0.0.

internal/cacheIndexOf.js

@@ -0,0 +1,19 @@
+import isObject from '../lang/isObject';
+
+/**
+ * Checks if `value` is in `cache` mimicking the return signature of
+ * `_.indexOf` by returning `0` if the value is found, else `-1`.
+ *
+ * @private
+ * @param {Object} cache The cache to search.
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `0` if `value` is found, else `-1`.
+ */
+function cacheIndexOf(cache, value) {
+  var data = cache.data,
+      result = (typeof value == 'string' || isObject(value)) ? data.set.has(value) : data.hash[value];
+
+  return result ? 0 : -1;
+}
+
+export default cacheIndexOf;