Bump @types/chai from 4.2.19 to 4.2.20 (#633)

Bumps [@types/chai](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/chai) from 4.2.19 to 4.2.20.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/chai)

---
updated-dependencies:
- dependency-name: "@types/chai"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -278,7 +278,7 @@
 		"test": "npm run compile && node ./out/test/runTest.js"
 	},
 	"devDependencies": {
-		"@types/chai": "^4.2.19",
+		"@types/chai": "^4.2.20",
 		"@types/glob": "^7.1.4",
 		"@types/mocha": "^8.2.2",
 		"@types/node": "^15.12.5",