Add TypeScript declaration file

Author: Arttse

.npmignore

@@ -1,2 +1,5 @@
 # All unnecessary
 *
+
+# But not
+!index.d.ts

index.d.ts

@@ -0,0 +1,9 @@
+/**
+ * Checks for the presence of URL protocol without a slashes (colon-slash-slash)
+ *
+ * @param str - string for check
+ *
+ * @returns true if it is a URL and protocol without slashes
+ */
+declare const isUrlProtocolWithoutSlashes: (str: string) => Boolean;
+export default isUrlProtocolWithoutSlashes;

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.3",
   "description": "Checks for the presence of URL protocol without a slashes (colon-slash-slash)",
   "main": "index.js",
+  "types": "index.d.ts",
   "sideEffects": false,
   "scripts": {
     "lint": "eslint .",