Update docs and Makefile target (#57)

* Update examples

* Remove update-deps target...go get -u is generally not what you want and we want more targeted updates

* Go mod tidy

* Fix up tools

* Update docs

tools/tools.go

@@ -2,6 +2,8 @@
 
 package tools
 
+//go:generate go install github.com/hashicorp/terraform-plugin-docs/cmd/tfplugindocs
+
 import (
 	// docs generator
 	_ "github.com/hashicorp/terraform-plugin-docs/cmd/tfplugindocs"