add prettier for auto formatting (#231)

* [Prettier] Add "prettier"

Makes the formatting of the code consistent.
By using the eslint-plugin-prettier formatting issues will be highlighted as a lint error.
These errors will be auto fixed by running "lint --fix" (which can be done automatically on file save)

* [Prettier] Add "prettier" - Fix formatting

src/components/library/LibraryOptionsProvider.tsx

@@ -5,7 +5,9 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-import LibraryOptionsContext, { DefaultLibraryOptions } from 'components/context/LibraryOptionsContext';
+import LibraryOptionsContext, {
+    DefaultLibraryOptions,
+} from 'components/context/LibraryOptionsContext';
 import React from 'react';
 import useLocalStorage from 'util/useLocalStorage';
 
@@ -14,7 +16,10 @@ interface IProps {
 }
 
 const LibraryOptionsContextProvider: React.FC<IProps> = ({ children }) => {
-    const [options, setOptions] = useLocalStorage<LibraryOptions>('libraryOptions', DefaultLibraryOptions);
+    const [options, setOptions] = useLocalStorage<LibraryOptions>(
+        'libraryOptions',
+        DefaultLibraryOptions,
+    );
 
     return (
         <LibraryOptionsContext.Provider value={{ options, setOptions }}>