update todos/readme

Author: achristmascarl

README.md

@@ -3,9 +3,14 @@ a database management tui for postgres
 
 > [frogs find refuge in elephant tracks](https://www.sciencedaily.com/releases/2019/06/190604131157.htm) 
 
+## usage
+`make dev`
+or
+`cargo run -- -u $(url)`
+
 ## TODO
 - [x] scrollable table 
-- [ ] async querying (spawn tokio task?)
+- [x] cancellable async querying (spawn tokio task)
 - [ ] menu list with tables and schemas (collapsable)
 - [ ] loading state when querying
 - [ ] tui-textarea for query editor