Update contributors.yml (pyOpenSci#72)

Added myself as a reviewer

Co-authored-by: Ivan Ogasawara <[email protected]>

Author: arthur-e

_data/contributors.yml

@@ -356,6 +356,16 @@
   packages-submitted: ["physcraper"]
   packages-reviewed: [""]
   packages-editor: [""]
+- name: K. Arthur Endsley
+  bio: 'Computational Geoscientist'
+  organization: "W.A. Franke College of Forestry and Conservation, University of Montana"
+  github_username: arthur-e
+  github_image_id: 1211103
+  contributor_type:
+    - reviewer
+  packages-submitted: [""]
+  packages-reviewed: ["Jointly"]
+  packages-editor: [""]
 - name: Alejandro Sáez Mollejo
   bio: 'Aerospace engineer'
   organization: ""