chore(test): upgrade to ava v5 (#561)

Resolves all outstanding security vulnerabilities

Co-authored-by: Jonathon Hill <jonathon@compwright.com>

.github/workflows/node.js.yml

@@ -31,9 +31,9 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [14.x, 16.x, 18.x]
         include:
-          - node-version: 14.x
+          - node-version: 18.x
             report-coverage: true
 
     steps:
@@ -52,7 +52,7 @@ jobs:
         uses: actions/setup-node@v1
         if: '!steps.cache.outputs.cache-hit'
         with:
-          node-version: 14.x
+          node-version: 18.x
       - name: Install dependencies
         if: '!steps.cache.outputs.cache-hit'
         run: npm ci
@@ -88,10 +88,10 @@ jobs:
           # push.
           # See https://github.com/semantic-release/git/issues/196#issuecomment-601310576.
           persist-credentials: false
-      - name: Use Node.js 14.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 18.x
       - name: Restore dependencies
         id: cache
         uses: actions/cache@v2