Remove dependency on flowcommerce/apidoc

Author: Ben Iofel

go.mod

@@ -4,8 +4,8 @@ go 1.15
 
 require (
 	github.com/bradfitz/slice v0.0.0-20180809154707-2b758aa73013
-	github.com/flowcommerce/apidoc v0.0.0-20160831220209-3530ddeff243 // indirect
-	github.com/flowcommerce/tools v0.0.0-20201012200937-c79fdda1d469
+	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
+	github.com/flowcommerce/tools v0.0.0-20220104080021-dd447d9a3476
 	github.com/urfave/cli v1.22.5
 	go4.org v0.0.0-20201209231011-d4a079459e60 // indirect
 )