tools+lint: fix linter for Go 1.18

.golangci.yml

@@ -43,7 +43,7 @@ linters-settings:
       - G402 # Look for bad TLS connection settings.
       - G306 # Poor file permissions used when writing to a new file.
   staticcheck: 
-    go: "1.16"
+    go: "1.18"
     checks: ["-SA1019"]
 
 linters:

tools/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.17.3-buster
+FROM golang:1.18.0-buster
 
 RUN apt-get update && apt-get install -y git
 ENV GOCACHE=/tmp/build/.cache