Bumping up spoon-runner version to 1.7.1

[jainsahab]

this change is required to fix the issue in which spoon-runner was not able to generate the coverage reports when target application is crashed. See this issue for more details.

[ajitsing]

This is a much needed change, I have also faced this issue a lot of times in my project. Please address this ASAP.

[danielgomezrico]

@roman-mazur it will be cool if you can check this. +1

[roman-mazur]

Please keep in mind that you can always change spoon runner dependency in your own project:

dependencies {
  classpath 'com.stanfy.spoon:spoon-gradle-plugin:1.2.2'
  classpath 'com.squareup.spoon:spoon-runner:1.7.1'
}