remove tools.go, less dependencies

Makefile

@@ -1,3 +1,5 @@
+.PHONY: all lint test deps
+
 REDOC_PATH=assets/redoc.standalone.js
 REDOC_URL=https://cdn.jsdelivr.net/npm/redoc/bundles/redoc.standalone.js
 
@@ -6,10 +8,13 @@ all: $(REDOC_PATH) lint test
 lint:
 	go fmt ./...
 	go vet ./...
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint run ./...
+	golangci-lint run ./...
 
 test:
 	go test -race ./...
 
+deps:
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+
 $(REDOC_PATH):
 	curl -sL -o $(REDOC_PATH) $(REDOC_URL)

go.mod

@@ -2,7 +2,10 @@ module github.com/mvrilo/go-redoc
 
 go 1.16
 
+require github.com/stretchr/testify v1.8.4
+
 require (
-	github.com/golangci/golangci-lint v1.55.2
-	github.com/stretchr/testify v1.8.4
+	github.com/kr/text v0.2.0 // indirect
+	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
+	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 )