chore!: migrate to null safety (#15)

Author: jorgecoca

.github/workflows/main.yaml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      image: google/dart:2.8.4
+      image: google/dart:2.12-beta
     steps:
       - uses: actions/checkout@v2
       - name: Install Dependencies

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 2.0.0-nullsafety.0
+
+- chore: migrate to null safety
+
 # 1.0.4
 
 - docs: README and metadata updates

example/pubspec.yaml

@@ -1,5 +1,6 @@
 name: very_good_analysis_example
 version: 0.0.1
+publish_to: none
 
 dependencies:
   very_good_analysis:

pubspec.yaml

@@ -1,5 +1,5 @@
 name: very_good_analysis
-version: 1.0.4
+version: 2.0.0-nullsafety.0
 description: >-
   Very Good Dart analyzer settings and best practices used internally at Very Good Ventures.
 repository: https://github.com/VeryGoodOpenSource/very_good_analysis
@@ -8,7 +8,7 @@ homepage: https://github.com/VeryGoodOpenSource/very_good_analysis
 documentation: https://github.com/VeryGoodOpenSource/very_good_analysis
 
 environment:
-  sdk: ">=2.0.0 <3.0.0"
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dependencies:
-  pedantic: ^1.0.0
+  pedantic: ^1.10.0-nullsafety.3