v3

Implement the spirit of previous versions in a single file with just a
few simple functions. Adds inherent support for prepared statements, as
well as QueryRowContext.

It is very plausible that this module, which is now less than 100 lines
of code, is a good candidate for copy-paste installation.

Author: mdwhatcott

Makefile

@@ -4,7 +4,7 @@ test: fmt
 	GORACE="atexit_sleep_ms=50" go test -timeout=1s -race -covermode=atomic ./...
 
 fmt:
-	go fmt ./...
+	go mod tidy && go fmt ./...
 
 compile:
 	go build ./...