Enable @typescript-eslint/explicit-member-accessibility on /src (#9785)

* Enable `@typescript-eslint/explicit-member-accessibility` on /src

* Prettier

src/components/structures/FilePanel.tsx

@@ -51,7 +51,7 @@ interface IState {
  * Component which shows the filtered file using a TimelinePanel
  */
 class FilePanel extends React.Component<IProps, IState> {
-    static contextType = RoomContext;
+    public static contextType = RoomContext;
 
     // This is used to track if a decrypted event was a live event and should be
     // added to the timeline.
@@ -59,7 +59,7 @@ class FilePanel extends React.Component<IProps, IState> {
     public noRoom: boolean;
     private card = createRef<HTMLDivElement>();
 
-    state = {
+    public state = {
         timelineSet: null,
         narrow: false,
     };