fix: upgrades to jsii-docgen don't trigger releases (#1795)

Construct hub is currently experiencing failures like these:

```console
Error loading assembly from file /tmp/zENg8p/node_modules/projen/.jsii:\nError: This jsii tool cannot load the given assembly; using unsupported feature(s): class-covariant-overrides (supported features: intersection-types)
```

This error was resolved in
https://github.com/cdklabs/jsii-docgen/releases/tag/v10.11.0, which was
released on Oct 23.
However, construct hub [latest
release](https://github.com/cdklabs/construct-hub/releases/tag/v0.4.423)
is from Oct 17 so we don't have a version of construct hub who's bundles
use this new version.

This PR will trigger a release (because its a `fix`) as well as ensure
future dev upgrades will trigger a release as well.

### Note

Not all dev dependencies participate in our bundling process (namely
test packages) - but we don't currently have a mechanism to trigger
releases on specific package upgrades.


----

*By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license*

---------

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: iliapolo

.projen/tasks.json

@@ -1,6 +1,6 @@
 import { join, relative } from 'path';
 import { CdklabsConstructLibrary } from 'cdklabs-projen-project-types';
-import { github } from 'projen';
+import { github, ReleasableCommits } from 'projen';
 import { addDevApp } from './projenrc/dev-app';
 import { discoverEcsTasks } from './projenrc/magic-ecs';
 import { discoverLambdas } from './projenrc/magic-lambda';
@@ -17,6 +17,13 @@ const peerDeps = [
 
 const cdkCli = 'aws-cdk@^2';
 
+const releasableCommitsCmd = [
+  ReleasableCommits.featuresAndFixes().cmd,
+
+  // dev dependencies affect our bundles
+  "'chore\\(deps\\): upgrade dev dependencies'",
+];
+
 const project = new CdklabsConstructLibrary({
   cdkVersion,
   setNodeEngineVersion: false,
@@ -109,6 +116,9 @@ const project = new CdklabsConstructLibrary({
   enablePRAutoMerge: true,
 
   releaseToNpm: true,
+  releasableCommits: ReleasableCommits.exec(
+    releasableCommitsCmd.join(' --grep ')
+  ),
   cdklabsPublishingDefaults: false,
 
   publishToGo: undefined,