Feature/merge options #5 (#6)

* ➕ Add dependency lodash

* ✨ Add helper function to merge chartOptions

* Change Charts to merge options

* And renamed options data to defaultOptions

src/helpers/options.js

@@ -0,0 +1,5 @@
+import merge from 'lodash/fp/merge'
+
+export function mergeOptions (obj, src) {
+  return merge(obj, src)
+}