feat(empty): add empty function

src/empty.js

@@ -0,0 +1,24 @@
+// o
+import is from './is';
+import size from './size';
+
+/**
+ * Check if an object is empty (has no keys)
+ *
+ * @param {object} object The object to check
+ *
+ * @returns {boolean} Whether it is empty
+ */
+function empty(object) {
+  // check if the object specified is an object
+  if (is(object)) {
+    // if it is get the size of the object and return true if it
+    // is larger then 0 meaning it isn't empty
+    return !(size(object) > 0);
+  }
+
+  // return false if the object isn't an object
+  return false;
+}
+
+export default empty;