Fix CI tests

.golangci.yml

@@ -0,0 +1,12 @@
+# See https://github.com/golangci/golangci-lint/blob/master/.golangci.yml for more examples
+
+linters:
+    enabled:
+        # In addition to default standard linters (see: golangci-lint help linters)
+        # Try extra ones line this: golangci-lint run --disable-all --enable=lll
+        - goimports
+        # For future consideration (requires some extra work, but suggestions look useful)
+        # - gocritic
+        # - golint # can sometimes be a bit pedantic
+        # - lll
+

.travis.yml

@@ -1,7 +1,9 @@
 sudo: false
 language: go
-before_script:
-  - go get github.com/golangci/golangci-lint/cmd/golangci-lint
-  - go install github.com/golangci/golangci-lint/cmd/golangci-lint
+env:
+  - GO111MODULE=on
+go:
+  - 1.x  # latest version
+  - 1.12 # lowest supported version
 script:
-  - golangci-lint run --enable-all # this is excessive but we get away with it for now
+  - ./test.sh

go.mod

@@ -2,4 +2,7 @@ module github.com/PowerDNS/go-dnsdist-client
 
 go 1.14
 
-require golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9
+require (
+	github.com/golangci/golangci-lint v1.27.0
+	golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9
+)