version should be 0.10.10-nullsafety (dart-lang/source_maps#54)

pkgs/source_maps/CHANGELOG.md

diff --git a/pkgs/source_maps/CHANGELOG.md b/pkgs/source_maps/CHANGELOG.md
index 155b6cd..5af5752 100644
--- a/pkgs/source_maps/CHANGELOG.md
+++ b/pkgs/source_maps/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 0.10.1-nullsafety
+## 0.10.10-nullsafety
 
 * Migrate to null safety
 

pkgs/source_maps/pubspec.yaml

diff --git a/pkgs/source_maps/pubspec.yaml b/pkgs/source_maps/pubspec.yaml
index d540efb..1951d72 100644
--- a/pkgs/source_maps/pubspec.yaml
+++ b/pkgs/source_maps/pubspec.yaml
@@ -1,5 +1,5 @@
 name: source_maps
-version: 0.10.1-nullsafety
+version: 0.10.10-nullsafety
 
 description: Library to programmatically manipulate source map files.
 homepage: https://github.com/dart-lang/source_maps