Split off dedicated changelog file

This allows tools like dependabot and renovatebot to pick up the file and show it in dependency update pull requests.

CHANGELOG.md

@@ -0,0 +1,35 @@
+# Changelog
+
+## 0.2.6
+
+- Update to Unicode 16.0.0.
+
+## 0.2.5
+
+- Update to Unicode 15.1.0.
+
+## 0.2.4
+
+- Update to Unicode 15.0.0.
+- Replace `const` tables with `static` tables.
+
+## 0.2.3
+
+- Update to Unicode 14.0.0.
+
+## 0.2.2
+
+- Add an ASCII fast-path.
+
+## 0.2.1
+
+- Update to Unicode 13.0.0.
+- Speed up lookup.
+
+## 0.2.0
+
+- Update to Unicode 12.1.0.
+
+## 0.1.0
+
+- Initial release.

README.md

@@ -22,40 +22,3 @@ fn main() {
 
 unicode-xid supports a `no_std` feature. This eliminates dependence
 on std, and instead uses equivalent functions from core.
-
-
-# changelog
-
-## 0.2.6
-
-- Update to Unicode 16.0.0.
-
-## 0.2.5
-
-- Update to Unicode 15.1.0.
-
-## 0.2.4
-
-- Update to Unicode 15.0.0.
-- Replace `const` tables with `static` tables.
-
-## 0.2.3
-
-- Update to Unicode 14.0.0.
-
-## 0.2.2
-
-- Add an ASCII fast-path.
-
-## 0.2.1
-
-- Update to Unicode 13.0.0.
-- Speed up lookup.
-
-## 0.2.0
-
-- Update to Unicode 12.1.0.
-
-## 0.1.0
-
-- Initial release.