Tweaks (#53)

* Fix loglevel parsing

* Bump dependencies

* Change --filter to --target

* Update documentation

* Import log handler as "loghandler"

* Change command color to purple

* Change flag name to target

* Update formatting

colors/colors.go

@@ -28,3 +28,8 @@ func Blue(s string) string {
 func White(s string) string {
 	return gchalk.White(s)
 }
+
+// Purple returns a purple string
+func Purple(s string) string {
+	return gchalk.RGB(196, 16, 224)(s)
+}