ErrorBoundary: use correct types for child components/fallbacks

src/components/ErrorBoundary/ErrorBoundary.tsx

@@ -1,22 +1,29 @@
 import React, { ErrorInfo } from "react";
 
 interface ErrorBoundaryProps {
-  fallback?: JSX.Element;
+  fallback?: JSX.Element | React.ReactNode;
 }
 
-export default class ErrorBoundary extends React.Component<ErrorBoundaryProps> {
+interface ErrorBoundaryState {
-  state = { errorMessage: "" };
+  errorMessage?: string
+}
+
+export default class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoundaryState> {
+  constructor(props: any) {
+    super(props);
+    this.state = { errorMessage: "" }
+  }
 
   static getDerivedStateFromError(error: any) {
     return { errorMessage: error.toString() };
   }
 
   componentDidCatch(error: any, info: ErrorInfo) {
-    console.error(error);
+    void(error);
     console.info(info);
   }
 
-  render() {
+  render(): JSX.Element | React.ReactNode {
     if (this.state.errorMessage) {
       return this.props.fallback ?? <p>{this.state.errorMessage}</p>;
     }