Prepare for the 2.11 dev SDKs

Bump the upper bound to allow 2.10 stable and 2.11.0 dev SDK versions.

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d2782c..b12b8e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.10.0-nullsafety.1
+
+- Allow 2.10 stable and 2.11.0 dev SDK versions.
+
 ## 1.10.0-nullsafety
 
 - Migrate to null safety.

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index cb11f74..d3fa24e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,9 +1,9 @@
 name: pedantic
-version: 1.10.0-nullsafety
+version: 1.10.0-nullsafety.1
 description: >-
   The Dart analyzer settings and best practices used internally at Google.
 homepage: https://github.com/dart-lang/pedantic
 
 environment:
   # This must remain a tight constraint until nnbd is stable
-  sdk: '>=2.10.0-0 <2.10.0'
+  sdk: '>=2.10.0-0 <2.11.0'