Add TypeScript version matrix to CI

Author: captbaritone

.github/workflows/ci.yaml

@@ -17,6 +17,10 @@ jobs:
           - 20.x # LTS
           - 22.x # LTS
           - 24.x # LTS
+        typescript-version: &typescript-versions
+          - "5.5"
+          - "5.7"
+          - "~5.9"
     steps:
       - uses: actions/checkout@v3
       - uses: pnpm/action-setup@v2
@@ -29,6 +33,8 @@ jobs:
           cache: "pnpm"
       - name: Install dependencies
         run: pnpm install
+      - name: Install TypeScript ${{ matrix.typescript-version }}
+        run: pnpm add -D typescript@${{ matrix.typescript-version }}
       - name: Build
         run: pnpm run build
       - name: Install dependencies
@@ -56,6 +62,7 @@ jobs:
     strategy:
       matrix:
         node-version: *node-versions
+        typescript-version: *typescript-versions
     steps:
       - uses: actions/checkout@v3
       - uses: pnpm/action-setup@v2
@@ -68,6 +75,8 @@ jobs:
           cache: "pnpm"
       - name: Install dependencies
         run: pnpm install
+      - name: Install TypeScript ${{ matrix.typescript-version }}
+        run: pnpm add -D typescript@${{ matrix.typescript-version }}
       - name: Build # Integration tests depend upon having .js versions created by tsc
         run: pnpm run build
       - name: Unit Tests