Fix documentation build and deploy issues

Author: Landon Gilbert-Bland

dev-reqirements.txt renamed to requirements.txt

@@ -41,7 +41,7 @@
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3 :: Only"
+        "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",