Merge pull request ethereum#208 from ethereum/ci-go

Circle CI: Test only Go 1.9 (min) and 1.12 (latest)

README.md

@@ -22,7 +22,7 @@ Please visit the [documentation].
 | ----------------------- | ------------------- | -------------------
 | **C**                   | C90, C99, C11       | GCC 6+, clang 3.8+
 | **C++** _(helpers)_[^1] | C++11, C++14, C++17 | GCC 6+, clang 3.8+
-| **Go** _(bindings)_     | 1.9, 1.10, 1.11     |
+| **Go** _(bindings)_     | 1.9 - 1.12          |
 
 [^1]: C++ support is provided by C headers and some optional C++ helpers.
 

circle.yml

@@ -134,9 +134,9 @@ jobs:
             git commit -m "Update docs"
             git push -f "https://$GITHUB_TOKEN@github.com/ethereum/evmc.git" HEAD:gh-pages
 
-  bindings-go-1.10:
+  bindings-go-latest:
     docker:
-      - image: circleci/golang:1.10
+      - image: circleci/golang
     steps: &bindings-go-steps
       - checkout
       - run:
@@ -148,16 +148,11 @@ jobs:
             go generate -v ./bindings/go/evmc
             go test -v ./bindings/go/evmc
 
-  bindings-go-1.9:
+  bindings-go-min:
     docker:
       - image: circleci/golang:1.9
     steps: *bindings-go-steps
 
-  bindings-go-1.11:
-    docker:
-      - image: circleci/golang:1.11
-    steps: *bindings-go-steps
-
   bindings-rust:
     docker:
       - image: rust:1
@@ -191,9 +186,8 @@ workflows:
       - build-cxx14
       - build-gcc6
       - build-clang3.8
-      - bindings-go-1.11
-      - bindings-go-1.10
-      - bindings-go-1.9
+      - bindings-go-latest
+      - bindings-go-min
       - bindings-rust
       - test-docs
       - upload-docs: