chore(package): update @types/jasmine to version 2.8.4

Closes #8

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "@angular/cli": "1.2.4",
     "@angular/compiler-cli": "^4.0.0",
     "@angular/language-service": "^4.0.0",
-    "@types/jasmine": "2.5.53",
+    "@types/jasmine": "2.8.4",
     "@types/node": "~8.0.13",
     "angular-cli-ghpages": "^0.5.1",
     "codelyzer": "~3.1.2",