Add breaking change type to newsfragment (#61)

* Add breaking change type to newsfragment

* Move breaking-change -> breaking

newsfragments/README.md

@@ -15,6 +15,7 @@ Each file should be named like `<ISSUE>.<TYPE>.rst`, where
 * `internal`
 * `removal`
 * `misc`
+* `breaking`
 
 So for example: `123.feature.rst`, `456.bugfix.rst`
 

newsfragments/validate_files.py

@@ -8,6 +8,7 @@ import pathlib
 import sys
 
 ALLOWED_EXTENSIONS = {
+    '.breaking.rst',
     '.bugfix.rst',
     '.doc.rst',
     '.feature.rst',

pyproject.toml

@@ -41,3 +41,8 @@ showcontent = true
 directory = "misc"
 name = "Miscellaneous changes"
 showcontent = false
+
+[[tool.towncrier.type]]
+directory = "breaking"
+name = "Breaking changes"
+showcontent = true