I6: Inform6lib 6.12.1 final checks

The 6.12 library is finally to the point where 6.12.1 is ready to be released. There was a problem with OOPS not being able to correct typos. I managed to get the library to correct nouns. Fixing prepositions is still broken. A more complete and correct fix will require significant investigation and testing. The remaining trouble is relatively minor and I have therefore agreed to push the fix into 6.12.2.

Those of you who are following this development, would you please take one last look at the 6.12 library and see if there’s anything I might have missed?

As always, the Library is at github.com/DavidGriffith/inform6lib