Travis: use Go 1.12

.travis.yml

@@ -1,4 +1,4 @@
-language: c
+language: go
 
 # https://docs.travis-ci.com/user/caching/
 cache:
@@ -9,18 +9,14 @@ git:
   # when multiple CI builds are queued, the tested commit needs to be in the last X commits cloned with "--depth X"
   depth: 10
 
+go: "1.12.x"
+
 matrix:
   include:
     - os: linux
-      dist: trusty
       before_install:
         - export GOPATH=$HOME/go
     - os: osx
-      addons:
-        homebrew:
-          packages:
-            - go
-          update: true
       before_install:
         - export GOPATH=$HOME/go
 
@@ -28,11 +24,9 @@ install:
   # build nim from our own branch - this to avoid the day-to-day churn and
   # regressions of the fast-paced Nim development while maintaining the
   # flexibility to apply patches
-  - if [ "$TRAVIS_OS_NAME" = "linux" ]; then eval "$(gimme --force 1.12.7)"; fi
   - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus/devel/build_nim.sh
   - env MAKE="make -j2" bash build_nim.sh Nim csources dist/nimble NimBinaries
   - export PATH="$PWD/Nim/bin:$GOPATH/bin:$PATH"
-  - go version
   - git clone https://github.com/libp2p/go-libp2p-daemon
   - cd go-libp2p-daemon
   # - git checkout v0.0.1
@@ -40,5 +34,6 @@ install:
   - cd $HOME/build/status-im/nim-libp2p
 
 script:
-  - nimble install -y
+  - nimble install -y --depsOnly
   - nimble test
+