chore(deps): update actions/setup-node action to v2 (#43)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

.github/workflows/shipjs-manual-prepare.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           fetch-depth: 0
           ref: master
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: |
           if [ -f "yarn.lock" ]; then
             yarn install

.github/workflows/shipjs-schedule-prepare.yml

@@ -11,7 +11,7 @@ jobs:
         with:
           fetch-depth: 0
           ref: master
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
       - run: |
           if [ -f "yarn.lock" ]; then
             yarn install

.github/workflows/shipjs-trigger.yml

@@ -12,7 +12,7 @@ jobs:
         with:
           ref: master
 
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           registry-url: "https://registry.npmjs.org"
       - run: |