migrate to jest (#721)

* migrate rrweb-snapshot tests to jest

* migrate rrweb tests to jest

packages/rrweb-snapshot/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "prepare": "npm run prepack",
     "prepack": "npm run bundle && npm run typings",
-    "test": "cross-env TS_NODE_CACHE=false TS_NODE_FILES=true mocha -r ts-node/register test/**/*.ts",
+    "test": "jest",
     "bundle": "rollup --config",
     "bundle:es-only": "cross-env ES_ONLY=true rollup --config",
     "typings": "tsc -d --declarationDir typings",
@@ -39,18 +39,18 @@
   "devDependencies": {
     "@rollup/plugin-typescript": "^8.2.5",
     "@types/chai": "^4.1.4",
+    "@types/jest": "^27.0.2",
     "@types/jsdom": "^16.2.4",
-    "@types/mocha": "^5.2.5",
     "@types/node": "^10.11.3",
     "@types/puppeteer": "^1.12.4",
-    "chai": "^4.1.2",
     "cross-env": "^5.2.0",
+    "jest": "^27.2.4",
     "jest-snapshot": "^23.6.0",
     "jsdom": "^16.4.0",
-    "mocha": "^5.2.0",
     "puppeteer": "^1.15.0",
     "rollup": "^2.45.2",
     "rollup-plugin-terser": "^7.0.2",
+    "ts-jest": "^27.0.5",
     "ts-node": "^7.0.1",
     "tslib": "^1.9.3",
     "tslint": "^4.5.1",