* fix bug (#146) so that `return` from a Procedure does not
interrupt the calling code block
* remove numpy.memmap from default methods
* add discussion of numpy functions/objects that can open files
* add support and tests for `lambda` expressions
* add default permissions to github actions
* update README, doc, remove cruft
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-asteval?expand=0&rev=47
