Update actions/setup-node requirement to v2.1.5 (#69)

* Update actions/setup-node requirement to v2.1.5

Updates the requirements on [actions/setup-node](https://github.com/actions/setup-node) to permit the latest version.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/commits/46071b5c7a2e0c34e49c3cb8a0e792e86e18d5ea)

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

* Apply suggestions from code review

Co-authored-by: Steven <steven@ceriously.com>
Co-authored-by: Michaël De Boey <info@michaeldeboey.be>

.github/workflows/cancel-self.yml

@@ -13,5 +13,5 @@ jobs:
         uses: ./ # Uses an action in the root directory
         with:
           access_token: ${{ github.token }}
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: echo 'Sleeping...'; sleep 120; echo 'Done.';

.github/workflows/long.yml

@@ -7,5 +7,5 @@ jobs:
     runs-on: ubuntu-latest
     name: Task
     steps:
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: echo 'Sleeping...'; sleep 120; echo 'Done.';

.github/workflows/longer.yml

@@ -7,5 +7,5 @@ jobs:
     runs-on: ubuntu-latest
     name: Task
     steps:
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: echo 'Sleeping...'; sleep 120; echo 'Done.';

.github/workflows/sleep120.yml

@@ -7,5 +7,5 @@ jobs:
     runs-on: ubuntu-latest
     name: Task
     steps:
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: echo 'Sleeping...'; sleep 120; echo 'Done.';