rev the min sdk bounds to opt into nnbd (#26)

devoncarew · web-flow · commit f470ce2de2f6 · 2022-06-06T08:28:35.000-07:00
diff --git a/pubspec.yaml b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: dart_syntax_highlight
 publish_to: none
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 #dependencies:
