improve coverage repport

Author: AugustinMauroy

package.json

@@ -18,7 +18,7 @@
   },
   "scripts": {
     "test": "node --no-warnings --test --experimental-strip-types test/**.test.ts",
-    "test:coverage": "node --no-warnings --test --experimental-strip-types --experimental-test-coverage test/**.test.ts",
+    "test:coverage": "node --no-warnings --test --experimental-strip-types --experimental-test-coverage --test-coverage-exclude='**/.cache/**' --test-coverage-exclude='test/**' test/**.test.ts",
     "cli": "node --no-warnings --experimental-strip-types src/bin.ts",
     "build": "rimraf dist dist-esm && tsc && tsc -p tsconfig.esm.json",
     "prepack": "node --run build"