Bump actions/setup-node from v1 to v2.1.5

Bumps [actions/setup-node](https://github.com/actions/setup-node) from v1 to v2.1.5.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v1...46071b5)

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

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
 
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2.1.5
         with:
           node-version: '12.x'
 

.github/workflows/unittest.yml

@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
 
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2.1.5
         with:
           node-version: '12.x'