Use latest version of golangci-lint.

Makefile

@@ -26,7 +26,7 @@ all: build lint test
 
 bootstra%:
 	# Using a released version of golangci-lint to take into account custom replacements in their go.mod
-	$Q curl -sSfL https://raw.githubusercontent.com/smallstep/cli/master/make/golangci-install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.39.0
+	$Q curl -sSfL https://raw.githubusercontent.com/smallstep/cli/master/make/golangci-install.sh | sh -s -- -b $(shell go env GOPATH)/bin v1.42.1
 
 .PHONY: bootstra%