Update jest to support queueMircotask

package.json

@@ -27,7 +27,7 @@
     "survey-core": "latest"
   },
   "devDependencies": {
-    "@types/jest": "^23.3.3",
+    "@types/jest": "^25.1.5",
     "@types/lodash": "4.14.121",
     "@types/node": "7.0.4",
     "@typescript-eslint/eslint-plugin": "^4.31.0",
@@ -37,13 +37,13 @@
     "eslint": "^7.32.0",
     "generate-json-webpack-plugin": "0.2.1",
     "husky": "^2.7.0",
-    "jest": "^23.6.0",
+    "jest": "^25.2.7",
     "jest-junit": "^16.0.0",
     "live-server": "^1.2.2",
     "rimraf": "2.5.4",
     "standard-version": "^8.0.1",
     "surveyjs-doc-generator": "git+https://github.com/surveyjs/surveyjs-doc-generator.git",
-    "ts-jest": "^23.10.3",
+    "ts-jest": "^25.2.7",
     "ts-loader": "2.3.4",
     "typescript": "^4.2.2",
     "webpack": "2.2.1",

tests/flat_signaturepad.test.ts

@@ -51,6 +51,8 @@ test('Check signaturepad', async () => {
 
 test('Check signaturepad with backgroundImage', async () => {
     SurveyHelper.shouldConvertImageToPng = false;
+    const oldXMLSerializer = window.XMLSerializer;
+    window.XMLSerializer = undefined as any;
     let json: any = {
         questions: [
             {
@@ -85,4 +87,5 @@ test('Check signaturepad with backgroundImage', async () => {
     TestHelper.equalRect(expect, htmlBrick, assumeHTML);
     TestHelper.equalRect(expect, backgroundImageBrick, assumeHTML);
     SurveyHelper.shouldConvertImageToPng = true;
+    window.XMLSerializer = oldXMLSerializer
 });