[plugins.json] Add cocoapods-specCTest

[199055]

Please add the following entry to the plugins.json file:

{
  "gem": "cocoapods-specCTest",
  "name": "CocoaPods Specctest",
  "author": "zhangyapeng",
  "url": "https://github.com/199055/XYDebuger",
  "description": "cocoapods-specCTest"
}