Add typedoc (documentation tool)

Author: sinergise-anze

.gitignore

@@ -1,5 +1,6 @@
 # See http://help.github.com/ignore-files/ for more about ignoring files.
 dist/
+doc/
 # dependencies
 node_modules
 .env

package-lock.json

@@ -32,6 +32,7 @@
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-typescript2": "^0.20.1",
     "ts-jest": "^25.2.0",
+    "typedoc": "^0.16.11",
     "typescript": "^3.5.1"
   },
   "scripts": {
@@ -41,7 +42,8 @@
     "lint": "eslint --max-warnings 0 --ext .ts,js src/",
     "prettier": "prettier --write \"{src,example,stories}/**/*.{ts,js}\"",
     "storybook": "start-storybook -p 6006",
-    "build-storybook": "build-storybook"
+    "build-storybook": "build-storybook",
+    "build-doc": "typedoc --excludePrivate --excludeProtected --out doc/ src/"
   },
   "jest": {
     "moduleFileExtensions": [