Making some properties optional

Author: andrerpena

demo/App.tsx

@@ -60,9 +60,9 @@ export class App extends React.Component<{}, AppState> {
   };
 
   render() {
-    const save: SaveImageHandler = async function* (data: ArrayBuffer) {
+    const save: SaveImageHandler = async function*(data: ArrayBuffer) {
       // Promise that waits for "time" milliseconds
-      const wait = function (time: number) {
+      const wait = function(time: number) {
         return new Promise((a, r) => {
           setTimeout(() => a(), time);
         });

src/components/ReactMde.tsx

@@ -29,10 +29,10 @@ export interface ReactMdeProps {
   selectedTab: "write" | "preview";
   onTabChange: (tab: "write" | "preview") => void;
   generateMarkdownPreview: GenerateMarkdownPreview;
-  minEditorHeight: number;
-  maxEditorHeight: number;
+  minEditorHeight?: number;
+  maxEditorHeight?: number;
   initialEditorHeight?: number;
-  minPreviewHeight: number;
+  minPreviewHeight?: number;
   classes?: Classes;
   refs?: Refs;
   toolbarCommands?: ToolbarCommands;