chore(deps): update actions/setup-node action to v2 (#78)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-node](https://togithub.com/actions/setup-node) | action | major | `v1` -> `v2` |

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### Release Notes

<details>
<summary>actions/setup-node</summary>

### [`v2`](https://togithub.com/actions/setup-node/compare/v1...v2)

[Compare Source](https://togithub.com/actions/setup-node/compare/v1...v2)

</details>

---

### Configuration

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---

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.github/workflows/deploy-ibm-cloud-staging.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Use Node.js 12.x
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '12.x'
       - name: Install dependencies

.github/workflows/deploy-ibm-cloud.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Use Node.js 12.x
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '12.x'
       - name: Install dependencies
@@ -49,7 +49,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Use Node.js 12.x
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '12.x'
       - name: Install dependencies

.github/workflows/e2e-tests.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: Use Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - name: Install dependencies

.github/workflows/percy-update-base.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Use Node.js 14.x
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '14.x'
       - name: Install dependencies
@@ -39,7 +39,7 @@ jobs:
     steps:
       - uses: actions/checkout@master
       - name: Use Node.js 14.x
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '14.x'
       - name: Install dependencies