v1.12

docs/contributors/build_guide.md

 ### Build Requirements
-* A recent Go distribution (>=1.11)
+* A recent Go distribution (>=1.12)
 * If you're not on Linux, you'll need a Docker installation
-* Minikube requires at least 4GB of RAM to compile, which can be problematic when using docker-machine
+* minikube requires at least 4GB of RAM to compile, which can be problematic when using docker-machine
 
 #### Prerequisites for different GNU/Linux distributions