Move to pkg:lints (#41)

diff --git a/analysis_options.yaml b/analysis_options.yaml
index 60abe63..c6528bb 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,4 +1,4 @@
-include: package:pedantic/analysis_options.yaml
+include: package:lints/recommended.yaml
 
 analyzer:
   strong-mode:
diff --git a/pubspec.yaml b/pubspec.yaml
index 9eee52b..02136e3 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -5,10 +5,11 @@
 homepage: https://github.com/dart-lang/string_scanner
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   source_span: ^1.8.0
 
 dev_dependencies:
-  test: ^1.16.0-nullsafety
+  lints: ^1.0.0
+  test: ^1.16.0
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