refactor: use run step condition (#55)

* refactor: use run step condition

Composite run steps have had support for conditions [since November 9th, 2021](https://github.blog/changelog/2021-11-09-github-actions-conditional-execution-of-steps-in-actions/).

* chore: bump patch version

action.yml

@@ -51,13 +51,11 @@ runs:
 
     - name: Optionally set the derived SHAs as NX_BASE and NX_HEAD environment variables for the current job
       shell: bash
+      if: ${{ inputs.set-environment-variables-for-job == 'true' }}
       run: |
-        # Built-in Github action conditionals are not supported in composite steps so have to check manually in bash
-        if [ "${{ inputs.set-environment-variables-for-job }}" = "true" ]; then
-          echo "NX_BASE=${{ steps.setSHAs.outputs.base }}" >> $GITHUB_ENV
-          echo "NX_HEAD=${{ steps.setSHAs.outputs.head }}" >> $GITHUB_ENV
-          echo "NX_BASE and NX_HEAD environment variables have been set for the current Job"
-        fi
+        echo "NX_BASE=${{ steps.setSHAs.outputs.base }}" >> $GITHUB_ENV
+        echo "NX_HEAD=${{ steps.setSHAs.outputs.head }}" >> $GITHUB_ENV
+        echo "NX_BASE and NX_HEAD environment variables have been set for the current Job"
 branding:
   icon: "terminal"
   color: "blue"

package.json

@@ -1,6 +1,6 @@
 {
   "private": true,
-  "version": "2.2.3",
+  "version": "2.2.4",
   "license": "MIT",
   "description": "This package.json is here purely to control the version of the Action, in combination with https://github.com/JamesHenry/publish-shell-action",
   "scripts": {