Speed up CI tests (bluesky-social#704)

* couple of ci changes

* change script name

* missed quotes

* bump cache version

* try without matrices

* try with matrix again

* one more shard

.github/workflows/repo.yaml

@@ -19,15 +19,22 @@ jobs:
       - run: yarn install --frozen-lockfile
       - run: yarn build
   test:
+    strategy:
+      matrix:
+        shard: [1/4, 2/4, 3/4, 4/4]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 18
           cache: "yarn"
+      - uses: actions/cache@v3
+        with:
+          path: /tmp/jest_rt
+          key: ${{ hashFiles('**/yarn.lock') }}-${{ matrix.shard }}
       - run: yarn install --frozen-lockfile
-      - run: yarn test
+      - run: yarn test:withFlags --maxWorkers=2 --shard=${{ matrix.shard }} --passWithNoTests
   verify:
     runs-on: ubuntu-latest
     steps:

package.json

@@ -13,7 +13,8 @@
     "verify": "lerna run verify --stream",
     "prettier": "lerna run prettier",
     "build": "lerna run build",
-    "test": "NODE_ENV=development lerna run test --stream"
+    "test": "NODE_ENV=development lerna run test --stream",
+    "test:withFlags": "NODE_ENV=development lerna run test --stream --"
   },
   "devDependencies": {
     "@babel/core": "^7.18.6",