Update dependencies/prune; change to golangci-lint for linter

.golangci.yml

@@ -0,0 +1,37 @@
+run:
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  deadline: 10m
+
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+  skip-files:
+    #- ".*\\.my\\.go$"
+    #- lib/bad.go
+
+linters:
+  enable:
+    - deadcode
+    - errcheck
+    - goconst
+    - gofmt
+    - goimports
+    - golint
+    - gosimple
+    - govet
+    - ineffassign
+    - megacheck
+    - misspell
+    - staticcheck
+    - structcheck
+    - varcheck
+  disable-all: true
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - "composite literal uses unkeyed fields"

Gopkg.toml

@@ -1,2 +1,8 @@
+[prune]
+  go-tests = true
+  unused-packages = true
+  non-go = true
+
 [[constraint]]
   name = "github.com/stretchr/testify"
+  version = "~v1.2.2"

Makefile

@@ -1,9 +1,11 @@
+GOTOOLS = \
+	github.com/golang/dep/cmd/dep \
+	github.com/golangci/golangci-lint/cmd/golangci-lint \
+	golang.org/x/tools/cmd/cover \
+
 .PHONY: setup
 setup: ## Install all the build and lint dependencies
-	go get -u github.com/golang/dep/cmd/dep
-	go get -u github.com/alecthomas/gometalinter
-	go get -u golang.org/x/tools/cmd/cover
-	gometalinter --install
+	go get -u $(GOTOOLS)
 
 .PHONY: dep
 dep: ## Install all import dependencies
@@ -23,19 +25,7 @@ fmt: ## gofmt and goimports all go files
 
 .PHONY: lint
 lint: ## Run all the linters
-	gometalinter --vendor --disable-all \
-		--enable=deadcode \
-		--enable=ineffassign \
-		--enable=gosimple \
-		--enable=staticcheck \
-		--enable=gofmt \
-		--enable=goimports \
-		--enable=misspell \
-		--enable=errcheck \
-		--enable=vet \
-		--enable=vetshadow \
-		--deadline=10m \
-		./...
+	golangci-lint run
 
 .PHONY: ci
 ci: lint test ## Run all the tests and code checks