chore: bump @types/jest from 26.0.19 to 26.0.20 (#149)

Author: dependabot[bot]

package-lock.json

@@ -91,7 +91,7 @@
     "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^11.0.1",
     "@rollup/plugin-typescript": "^8.1.0",
-    "@types/jest": "^26.0.19",
+    "@types/jest": "^26.0.20",
     "@types/lodash-es": "^4.17.4",
     "@types/node": "^14.14.20",
     "commitizen": "^4.2.2",