[Glass] a couple of minor updates to glass for pharo compatibility

[Jupiter Jones via Glass]

Hi Dale,

I was testing a project that was developed using tODE in Pharo and (so far) found a couple of deprecations I’d like to get into glass.

String>>asLegalSelector
deprecated in Pharo now...
String>>asValidSelector

Announcer>>on:send:to:
deprecated in Pharo now…
Announcer>>when:send:to:

I thought I just add them to the appropriate packages and send you a pull request, however I noticed that glassdb/glass is forked from GsDevKit/GsDevKit

Where is the appropriate place to make these changes?

Cheers,

Jupiter