chore: bump version 1.0.2

Makefile

@@ -2,15 +2,3 @@ dist: setup.py botlib/*
 	@echo Building...
 	python3 setup.py sdist bdist_wheel
 	rm -rf ./*.egg-info/ ./build/ MANIFEST
-
-env-publish:
-	@echo Creating virtual environment...
-	@python3 -m venv 'env-publish'
-	@source env-publish/bin/activate && pip install twine
-
-.PHONY: publish
-publish: dist env-publish
-	[ -z "$${VIRTUAL_ENV}" ]  # you can not do this inside a virtual environment.
-	@echo Publishing...
-	@echo "\033[0;31mEnter PyPI token in password prompt:\033[0m"
-	@source env-publish/bin/activate && export TWINE_USERNAME='__token__' && twine upload dist/*

botlib/__init__.py

@@ -1,7 +1,7 @@
 '''
 Collection of tools to streamline data format conversion.
 '''
-__version__ = '1.0.1'
+__version__ = '1.0.2'
 
 # import sys
 # if __name__ != '__main__':

botlib/cron.py

@@ -61,6 +61,7 @@ class Cron:
     def add_job(self, interval: int, callback: CronCallback, arg: Any = None) \
             -> Job:
         ''' Create and queue a new job. '''
+        assert callback and callable(callback), 'No Cron callback provided.'
         job = Cron.Job(interval, callback, arg)
         self.push(job)
         return job