Bump minimum python version in CONTRIBUTING.md. (#1854)

* Bump minimum python version in CONTRIBUTING.md.

* Fix random typo.

* More touch-ups.

[skip ci]

CONTRIBUTING.md

@@ -9,12 +9,12 @@ All pull requests should be based on the `nightly` branch, to minimize cross mer
 ### Python Code
 
 #### Compatibility
-The code should work with Python 3.6+. Note that Tautulli runs on many different platforms.
+The code should work with Python 3.7+. Note that Tautulli runs on many different platforms.
 
 Re-use existing code. Do not hesitate to add logging in your code. You can the logger module `plexpy.logger.*` for this. Web requests are invoked via `plexpy.request.*` and derived ones. Use these methods to automatically add proper and meaningful error handling.
 
 #### Code conventions
-Although Tautulli did not adapt a code convention in the past, we try to follow the [PEP8](http://legacy.python.org/dev/peps/pep-0008/) conventions for future code. A short summary to remind you (copied from http://wiki.ros.org/PyStyleGuide):
+Although Tautulli did not adopt a code convention in the past, we try to follow [PEP8](http://legacy.python.org/dev/peps/pep-0008/) conventions for future code. A short summary to remind you (copied from http://wiki.ros.org/PyStyleGuide):
 
  * 4 space indentation
  * 80 characters per line

Tautulli.py

@@ -246,7 +246,7 @@ def main():
     # Start the background threads
     plexpy.start()
 
-    # Force the http port if neccessary
+    # Force the http port if necessary
     if args.port:
         plexpy.HTTP_PORT = args.port
         logger.info('Using forced web server port: %i', plexpy.HTTP_PORT)