🧢 Decode error string presented in newer versions of hardhat (#763)

.changeset/shy-nails-design.md

@@ -0,0 +1,7 @@
+---
+"@ethereum-waffle/chai": patch
+"@ethereum-waffle/hardhat": patch
+"@ethereum-waffle/provider": patch
+---
+
+Decode revert string in hardhat 2.9.4+

.github/workflows/CI.yml

@@ -28,6 +28,48 @@ jobs:
         run: sudo cp ./.github/workflows/solc /bin
       - run: pnpm run build
       - run: pnpm run test
+  test-hardhat-pre-244:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16.x
+      - run: npm i -g pnpm@7.1.9
+      - run: pnpm install --frozen-lockfile --strict-peer-dependencies
+      - name: setup-solc
+        run: sudo cp ./.github/workflows/solc /bin
+      - run: pnpm run build
+      - name: Install versions of hardhat packages pre 2.4.4
+        run: |
+          pnpm add hardhat@2.9.2
+          pnpm add -D @nomiclabs/hardhat-waffle@2.0.3
+          pnpm add -D @nomiclabs/hardhat-ethers@2.0.3
+        working-directory: waffle-hardhat
+      - run: pnpm run test
+        working-directory: waffle-hardhat
+  test-hardhat-latest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16.x
+      - run: npm i -g pnpm@7.1.9
+      - run: pnpm install --frozen-lockfile --strict-peer-dependencies
+      - name: setup-solc
+        run: sudo cp ./.github/workflows/solc /bin
+      - run: pnpm run build
+      - name: Install latest versions of hardhat packages
+        run: |
+          pnpm add hardhat@latest
+          pnpm add -D @nomiclabs/hardhat-waffle@latest
+          pnpm add -D @nomiclabs/hardhat-ethers@latest
+        working-directory: waffle-hardhat
+      - run: pnpm run test
+        working-directory: waffle-hardhat
   docs-and-linter:
     runs-on: ubuntu-latest
     env: