Upgrade target to es2022 (#12852)

* Upgrade target to es2021

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Upgrade to es2022

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix babel config

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix React contexts

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix types

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Fix React state

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/elements/AppTile.tsx

@@ -120,7 +120,7 @@ interface IState {
 
 export default class AppTile extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
 
     public static defaultProps: Partial<IProps> = {
         waitForIframeLoad: true,
@@ -144,7 +144,6 @@ export default class AppTile extends React.Component<IProps, IState> {
 
     public constructor(props: IProps, context: ContextType<typeof MatrixClientContext>) {
         super(props, context);
-        this.context = context; // XXX: workaround for lack of `declare` support on `public context!:` definition
 
         // Tiles in miniMode are floating, and therefore not docked
         if (!this.props.miniMode) {

src/components/views/elements/EventListSummary.tsx

@@ -81,7 +81,7 @@ export default class EventListSummary extends React.Component<
     IProps & Required<Pick<IProps, "summaryLength" | "threshold" | "avatarsMaxLength" | "layout">>
 > {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public static defaultProps = {
         summaryLength: 1,

src/components/views/elements/PersistentApp.tsx

@@ -32,7 +32,7 @@ interface IProps {
 
 export default class PersistentApp extends React.Component<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
     private room: Room;
 
     public constructor(props: IProps, context: ContextType<typeof MatrixClientContext>) {

src/components/views/elements/ReplyChain.tsx

@@ -73,7 +73,7 @@ interface IState {
 // be low as each event being loaded (after the first) is triggered by an explicit user action.
 export default class ReplyChain extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private unmounted = false;
     private room: Room;

src/components/views/elements/RoomAliasField.tsx

@@ -41,7 +41,7 @@ interface IState {
 // Controlled form component wrapping Field for inputting a room alias scoped to a given domain
 export default class RoomAliasField extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private fieldRef = createRef<Field>();