add readme and example

README.md

@@ -1,2 +1,20 @@
-# booler
-Convert string to Boolean in JavaScript.
+# Booler: Convert any values to Boolean.
+
+Convert string/values to Boolean in JavaScript.
+
+# Installing
+
+# Example
+
+```js
+const booler = require('booler')
+
+console.log(booler('f')) // return false
+console.log(booler('t')) // return true
+```
+
+# Run Test
+
+```shell
+$ npm run test
+```