docs: improve coverage display

.github/workflows/codecov.yaml

@@ -0,0 +1,44 @@
+name: Codecov
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  run-tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          registry-url: https://registry.npmjs.org
+
+      - name: Restore yarn cache if available
+        uses: actions/cache@v2
+        id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+        with:
+          path: |
+            node_modules
+            */*/node_modules
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+
+      - name: Install dependencies
+        run: |
+          yarn install --frozen-lockfile
+
+      - name: Generate coverage reports
+        run: |
+          yarn test:ci
+        env:
+          CI: true
+
+      - name: Upload coverage
+        uses: codecov/codecov-action@v3

README.md

@@ -2,7 +2,7 @@
 
 ![Tests](https://github.com/enzoferey/ethers-error-parser/actions/workflows/test.yml/badge.svg)
 [![npm version](https://badge.fury.io/js/@enzoferey%2Fethers-error-parser.svg)](https://badge.fury.io/js/@enzoferey%2Fethers-error-parser)
-[![codecov.io Code Coverage](https://img.shields.io/codecov/c/github/enzoferey/ethers-error-parser.svg?maxAge=2592000)](https://codecov.io/github/enzoferey/ethers-error-parser)
+[![codecov](https://codecov.io/gh/enzoferey/ethers-error-parser/branch/main/graph/badge.svg?token=9amQLrkrar)](https://codecov.io/gh/enzoferey/ethers-error-parser)
 
 Parse Ethers.js errors with ease 💅🏻