Bump actions/setup-node from 1 to 2.1.5

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 1 to 2.1.5.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v1...v2.1.5)

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

.github/workflows/docs.yml

@@ -9,7 +9,7 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Installing Node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2.1.5
       with:
         node-version: 15
 

.github/workflows/lint.yml

@@ -9,7 +9,7 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Installing Node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2.1.5
       with:
         node-version: 15
 

.github/workflows/linux.yml

@@ -9,7 +9,7 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Install Node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2.1.5
       with:
         node-version: 15
 

.github/workflows/macos.yml

@@ -14,7 +14,7 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Installing Node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2.1.5
       with:
         node-version: 15
 

.github/workflows/windows.yml

@@ -9,7 +9,7 @@ jobs:
       uses: actions/checkout@v1
 
     - name: Installing Node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2.1.5
       with:
         node-version: 14