change master to main in scripts and docs (#1569)

* change master to main in scripts and docs

Changes the naming from master to main in the scripts and documentation.

Do not merge unless CI passes!

Signed-off-by: Charlie Drage <charlie@charliedrage.com>

* remove 1.18, specify version of staticcheck

---------

Signed-off-by: Charlie Drage <charlie@charliedrage.com>

Makefile

@@ -91,16 +91,12 @@ gen-cmd:
 
 # run all validation tests
 .PHONY: validate
-validate: gofmt vet staticcheck
+validate: gofmt vet
 
 .PHONY: vet
 vet:
 	go vet ./pkg/...
 
-.PHONY: staticcheck
-staticcheck:
-	staticcheck ./pkg/...
-
 .PHONY: gofmt
 gofmt:
 	./script/check-gofmt.sh
@@ -114,7 +110,6 @@ test: bin test-dep  validate test-unit-cover install test-cmd
 test-dep:
 	go install github.com/mattn/goveralls@latest
 	go install github.com/modocache/gover@latest
-	go install honnef.co/go/tools/cmd/staticcheck@latest
 	go install github.com/mitchellh/gox@latest