ci: update Node.js to v18 (#213)

* ci: update Node.js to v18

* chore: add nvmrc file

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.github/workflows/release_canary.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.github/workflows/release_candidate.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.github/workflows/size.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.nvmrc

@@ -0,0 +1 @@
+v18