bump golangci-lint to v1.18.0 for go1.13 support

Author: joelanford

CONTRIBUTING.md

@@ -18,7 +18,7 @@ Please see https://git.k8s.io/community/CLA.md for more info
 
 1. Setup tools
     ```bash
-    $ curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.17.1
+    $ curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.18.0
     ```
 1. Test
     ```bash

hack/check-everything.sh

@@ -67,10 +67,10 @@ function is_installed {
 }
 
 function fetch_go_tools {
-  header_text "Checking for gometalinter.v2"
+  header_text "Checking for golangci-lint"
   if ! is_installed golangci-lint; then
     header_text "Installing golangci-lint"
-    go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.17.1
+    go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.18.0
   fi
 }
 

hack/ci-check-everything.sh

@@ -23,7 +23,7 @@ export PATH=$(go env GOPATH)/bin:$PATH
 mkdir -p $(go env GOPATH)/bin
 
 echo "Installing golangci-lint"
-curl --location --silent --retry 5 --fail  https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.17.1
+curl --location --silent --retry 5 --fail  https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.18.0
 echo "Finished installing golangci-lint"
 
 $(dirname ${BASH_SOURCE})/check-everything.sh