Update function-schemata sub-module to HEAD (e23a73d)
New changes:
-
a2fb3f8definitions: Add Z1978/rhg-rohg and Z1979/rhg-arab ZNaturalLanguages -
9e311f6definitions: Add Z850/try-catch and Z851/throw function definitions, and implementations -
e23a73ddefinitions: Add Z852/"is error type" and Z853/"get error" builtin functions, and identity keys to Z50/error types