Upgrade dependencies and maybe fix tests

package.json

@@ -35,6 +35,7 @@
     "eslint-plugin-promise": "^6.0.0",
     "jest": "^26.6.3",
     "jest-puppeteer": "^6.0.0",
+    "jest-ts-webcompat-resolver": "^1.0.0",
     "jsdom": "^15.2.1",
     "prettier": "2.5.1",
     "puppeteer": "^13.1.2",
@@ -48,6 +49,7 @@
   },
   "jest": {
     "preset": "./jest.preset.cjs",
+    "resolver": "jest-ts-webcompat-resolver",
     "transform": {
       "^.+\\.tsx?$": "ts-jest"
     },

src/test/jest.d.ts

@@ -5,7 +5,7 @@ declare global {
   namespace jest {
     interface Matchers<R> {
       // The `= undefined` part is incorrect according to VSCode, but it is actually required.
-      toHaveTag(tagName: string, tagCategory: TagCategory | undefined = undefined): CustomMatcherResult;
+      toHaveTag(tagName: string, tagCategory?: TagCategory): CustomMatcherResult;
       toHaveNote(noteText: string): CustomMatcherResult;
       toHaveResolution(resolution: [number, number]): CustomMatcherResult;
       toHaveSource(source: string): CustomMatcherResult;

tsconfig.test.json

@@ -1,16 +1,16 @@
 {
   "compilerOptions": {
     "lib": [
-      "es2019",
-      "dom",
-      "dom.iterable"
+      "ES2019",
+      "DOM",
+      "DOM.Iterable"
     ],
     "outDir": "./dist/",
     "sourceMap": true,
     "strict": true,
-    "module": "es2015",
-    "moduleResolution": "node",
-    "target": "es2015",
+    "module": "ESNext",
+    "moduleResolution": "NodeNext",
+    "target": "ESNext",
     "skipLibCheck": true,
     "esModuleInterop": true,
     "removeComments": true,