Refactor/ts (#21)

* refactor(ts): add deps

* refactor(ts): add tsconfig

* refactor(rollup): configure ts

tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "outDir": "build",
+    "module": "esnext",
+    "target": "es5",
+    "lib": ["es6", "dom", "es2016", "es2017"],
+    "jsx": "react",
+    "moduleResolution": "node",
+    "forceConsistentCasingInFileNames": true,
+    "strictNullChecks": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "build", "dist", "example", "rollup.config.js"]
+}