fix(test): revert to jasmine 2.4.x as 2.5 breaks gulp-jasmine.

Author: alxhub

service-worker/worker/package.json

@@ -30,13 +30,13 @@
     "gulp": "^3.9.0",
     "gulp-clean": "^0.3.1",
     "gulp-concat": "^2.6.0",
-    "gulp-jasmine": "^2.2.1",
+    "gulp-jasmine": "^2.4.0",
     "gulp-rename": "^1.2.2",
     "gulp-rimraf": "^0.2.0",
     "gulp-typescript": "^2.12.1",
     "gulp-uglify": "^1.5.3",
     "gulp-util": "^3.0.7",
-    "jasmine": "^2.4.1",
+    "jasmine": "~2.4.1",
     "merge-stream": "^1.0.0",
     "protractor": "^3.3.0",
     "reflect-metadata": "0.1.2",