Update stryker-js monorepo to v8

Author: renovate[bot]

package.json

@@ -7,9 +7,9 @@
   "author": "Daniel Nixon <dan.nixon@gmail.com>",
   "license": "MIT",
   "devDependencies": {
-    "@stryker-mutator/core": "7.3.0",
-    "@stryker-mutator/jest-runner": "7.3.0",
-    "@stryker-mutator/typescript-checker": "7.3.0",
+    "@stryker-mutator/core": "8.7.0",
+    "@stryker-mutator/jest-runner": "8.7.0",
+    "@stryker-mutator/typescript-checker": "8.7.0",
     "@types/jest": "^29.5.4",
     "@typescript-eslint/eslint-plugin": "^6.6.0",
     "@typescript-eslint/parser": "^6.6.0",