chore(deps-dev): bump jsii-diff from 0.20.3 to 0.20.5

Bumps [jsii-diff](https://github.com/aws/jsii/tree/HEAD/packages/jsii-diff) from 0.20.3 to 0.20.5.
- [Release notes](https://github.com/aws/jsii/releases)
- [Changelog](https://github.com/aws/jsii/blob/master/packages/jsii-diff/CHANGELOG.md)
- [Commits](https://github.com/aws/jsii/commits/v0.20.5/packages/jsii-diff)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -19,7 +19,7 @@
     "conventional-changelog-cli": "^2.0.27",
     "fs-extra": "^8.1.0",
     "jest": "^24.9.0",
-    "jsii-diff": "^0.20.3",
+    "jsii-diff": "^0.20.5",
     "jsii-pacmak": "^0.20.3",
     "lerna": "^3.18.4",
     "nodeunit": "^0.11.3",