Null safety migration (flutter#13)

* Enable null safety experiment

* Update SDK constraint for null safety

* prep for merge to master (flutter#12)

Co-authored-by: Kevin Moore <kevmoo@google.com>
Co-authored-by: Jacob MacDonald <jakemac@google.com>

.travis.yml

@@ -1,11 +1,10 @@
 language: dart
 
 dart:
-  - 2.0.0
   - dev
 
 dart_task:
-  - dart_analyzer: --fatal-warnings --fatal-infos .
+  - dart_analyzer: --enable-experiment=non-nullable --fatal-warnings --fatal-infos .
 
 matrix:
   include:
@@ -15,7 +14,7 @@ matrix:
 
 # Only building master means that we don't run two builds for each pull request.
 branches:
-  only: [master]
+  only: [master, null_safety]
 
 cache:
  directories:

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.2.0-nullsafety
+
+- Opt in to null safety.
+
 ## 1.1.3
 
 - Added example, fixed recommended lints.

analysis_options.yaml

@@ -2,6 +2,10 @@ include: package:pedantic/analysis_options.yaml
 analyzer:
   strong-mode:
     implicit-casts: false
+
+  enable-experiment:
+  - non-nullable
+
 linter:
   rules:
     - avoid_empty_else

pubspec.yaml

@@ -1,12 +1,12 @@
 name: charcode
-version: 1.1.3
+version: 1.2.0-nullsafety
 description: >-
   Constants for ASCII and common non-ASCII character codes represented by
   top-level constants.
 homepage: https://github.com/dart-lang/charcode
 
 environment:
-  sdk: '>=2.0.0 <3.0.0'
+  sdk: '>=2.9.0-18.0 <2.9.0'
 
 dev_dependencies:
   pedantic: ^1.0.0