Include `manifest.json` in the package

Closes #238

README.md

@@ -17,6 +17,8 @@ $ npm install cryptocurrency-icons
 
 You can then import the icons from `./node_modules/cryptocurrency-icons`, for example `./node_modules/cryptocurrency-icons/svg/color/kmd.svg`.
 
+There's also a `manifest.json` file included in the package with a list of the currency symbol and name of the icons.
+
 
 ## Special Thanks 👏
 

package.json

@@ -9,7 +9,8 @@
 		"32",
 		"32@2x",
 		"128",
-		"svg"
+		"svg",
+		"manifest.json"
 	],
 	"keywords": [
 		"cryptocurrency",