Update CHANGELOG.md

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0145a48..9d83884 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 1.2.0-nullsafety.2
+
+- Add command line functionality to generate constants.
+  Allows clients to generate their own constants instead of
+  depending on the package at run-time.
+  Example: To generate the characters needed
+  for a hexadecimal numeral, run `pub run charcode a-fA-F\d+-`.
+
 ## 1.2.0-nullsafety.1
 
 - Allow 2.10 stable and 2.11.0 dev SDK versions.

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index 8ccc61f..8cb29ca 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: charcode
-version: 1.2.0-nullsafety.1
+version: 1.2.0-nullsafety.2
 description: >
   Constants for ASCII and common non-ASCII character codes.