✅ Move to v8 for coverage (#4873)

Instanbul used to be the default when we relied on Jest. V8 having its
own coverage measurements, we are trying to move to it and to see how
much it will impact our coverage.

.yarn/versions/4949103f.yml

@@ -0,0 +1,8 @@
+releases:
+  fast-check: patch
+
+declined:
+  - "@fast-check/ava"
+  - "@fast-check/jest"
+  - "@fast-check/vitest"
+  - "@fast-check/worker"

packages/fast-check/package.json

@@ -63,7 +63,7 @@
     "@fast-check/poisoning": "workspace:*",
     "@microsoft/api-extractor": "^7.43.0",
     "@types/node": "^20.12.5",
-    "@vitest/coverage-istanbul": "^1.4.0",
+    "@vitest/coverage-v8": "^1.4.0",
     "cross-env": "^7.0.3",
     "glob": "^10.3.12",
     "not-node-buffer": "npm:buffer@^6.0.3",

packages/fast-check/vitest.unit.config.mjs

@@ -11,7 +11,6 @@ export default defineConfig({
       enabled: true,
       include: ['src/**'],
       exclude: ['lib/**', 'test/**'],
-      provider: 'istanbul',
     },
     include: ['test/unit/**/*.spec.?(c|m)[jt]s?(x)'],
   },

yarn.lock

@@ -194,7 +194,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@ampproject/remapping@npm:^2.2.0":
+"@ampproject/remapping@npm:^2.2.0, @ampproject/remapping@npm:^2.2.1":
   version: 2.3.0
   resolution: "@ampproject/remapping@npm:2.3.0"
   dependencies:
@@ -5597,22 +5597,27 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@vitest/coverage-istanbul@npm:^1.4.0":
+"@vitest/coverage-v8@npm:^1.4.0":
   version: 1.4.0
-  resolution: "@vitest/coverage-istanbul@npm:1.4.0"
+  resolution: "@vitest/coverage-v8@npm:1.4.0"
   dependencies:
+    "@ampproject/remapping": "npm:^2.2.1"
+    "@bcoe/v8-coverage": "npm:^0.2.3"
     debug: "npm:^4.3.4"
     istanbul-lib-coverage: "npm:^3.2.2"
-    istanbul-lib-instrument: "npm:^6.0.1"
     istanbul-lib-report: "npm:^3.0.1"
     istanbul-lib-source-maps: "npm:^5.0.4"
     istanbul-reports: "npm:^3.1.6"
+    magic-string: "npm:^0.30.5"
     magicast: "npm:^0.3.3"
     picocolors: "npm:^1.0.0"
+    std-env: "npm:^3.5.0"
+    strip-literal: "npm:^2.0.0"
     test-exclude: "npm:^6.0.0"
+    v8-to-istanbul: "npm:^9.2.0"
   peerDependencies:
     vitest: 1.4.0
-  checksum: 10c0/0c1ac9ea86bfd03c06b9a05888daebb9f740b264f307884be200ee4be0026c08d9382d3f470b648cd9602130f1dec27e99e1438d893d6de9b9ecb470db3a8e12
+  checksum: 10c0/1ff9db69c8f45c9e3f57d513d577331c23748c53d93122889b8634d1997a61a2a37a7284f520b647b837f44150656c1127b9c3392112139224bb86678aae1e7e
   languageName: node
   linkType: hard
 
@@ -9443,7 +9448,7 @@ __metadata:
     "@fast-check/poisoning": "workspace:*"
     "@microsoft/api-extractor": "npm:^7.43.0"
     "@types/node": "npm:^20.12.5"
-    "@vitest/coverage-istanbul": "npm:^1.4.0"
+    "@vitest/coverage-v8": "npm:^1.4.0"
     cross-env: "npm:^7.0.3"
     glob: "npm:^10.3.12"
     not-node-buffer: "npm:buffer@^6.0.3"
@@ -11724,7 +11729,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"istanbul-lib-instrument@npm:^6.0.0, istanbul-lib-instrument@npm:^6.0.1":
+"istanbul-lib-instrument@npm:^6.0.0":
   version: 6.0.2
   resolution: "istanbul-lib-instrument@npm:6.0.2"
   dependencies:
@@ -18953,7 +18958,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"v8-to-istanbul@npm:^9.0.1":
+"v8-to-istanbul@npm:^9.0.1, v8-to-istanbul@npm:^9.2.0":
   version: 9.2.0
   resolution: "v8-to-istanbul@npm:9.2.0"
   dependencies: