BUG: Corrected email address

Author: rstoneback

setup.cfg

@@ -3,7 +3,7 @@ name = OMMBV
 version = file: OMMBV/version.txt
 url = https://github.com/CosmicStudioSoftware/OMMBV/
 author = Russell A. Stoneback
-author_email = github@cosmicstudio.io
+author_email = contact@cosmicstudio.io
 description = 'Orthogonal geomagnetic vector basis and field-line mapping for multipole magnetic fields.'
 long_description = file: README.md, CHANGELOG.md
 long_description_content_type = text/markdown