chore: update contributing docs (#1519)

Author: dsherret

CONTRIBUTING.md

@@ -1,4 +1,4 @@
-# Logging Bugs
+# Logging Bugs
 
 1. Start logging an issue in the [issue tracker](https://github.com/dsherret/ts-morph/issues).
 2. Clearly identify the problem and submit some reproduction code.
@@ -15,13 +15,8 @@
 
 # Contributing Features
 
-1. Log an issue in the [issue tracker](https://github.com/dsherret/ts-morph/issues). In the issue:
-   1. Propose the change.
-      - Outline all changes that will be made to the public API.
-      - Discuss any structural changes to the code if necessary.
-   2. Wait for discussion and green light from [@dsherret](https://github.com/dsherret) (who will try to reply as soon as possible, but it might take a few days).
-      - Note: If the change is small and you think it wouldn't take you too much time, then feel free to start working on it and even submit a PR. Just beware that you're taking the risk that it could be denied.
-2. After approval, start working on the change in a branch of `latest` and submit a PR.
+- Only minor features will be accepted.
+- Breaking changes that aren't bug or design fixes will not be merged.
 
 # Getting Started