chore: set max SDK version to <3.0.0 (#22)

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11e0c50..7f84286 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.1.3
+
+* Set max SDK version to `<3.0.0`, and adjust other dependencies.
+
 ## 3.1.2
 
 * Require Dart SDK 2.0.0-dev.17.0 or greater.

analysis_options.yaml

diff --git a/analysis_options.yaml b/analysis_options.yaml
deleted file mode 100644
index a10d4c5..0000000
--- a/analysis_options.yaml
+++ /dev/null
@@ -1,2 +0,0 @@
-analyzer:
-  strong-mode: true

pubspec.yaml

diff --git a/pubspec.yaml b/pubspec.yaml
index b33887c..585c91c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,16 +1,20 @@
 name: http_parser
-version: 3.1.2
-author: "Dart Team <misc@dartlang.org>"
-homepage: https://github.com/dart-lang/http_parser
+version: 3.1.3
+
 description: >
   A platform-independent package for parsing and serializing HTTP formats.
+author: Dart Team <misc@dartlang.org>
+homepage: https://github.com/dart-lang/http_parser
+
 environment:
-  sdk: ">=2.0.0-dev.17.0 <2.0.0"
+  sdk: '>=2.0.0-dev.17.0 <3.0.0'
+
 dependencies:
-  charcode: "^1.1.0"
-  collection: ">=0.9.1 <2.0.0"
-  source_span: "^1.0.0"
-  string_scanner: ">=0.0.0 <2.0.0"
-  typed_data: "^1.1.0"
+  charcode: ^1.1.0
+  collection: '>=0.9.1 <2.0.0'
+  source_span: ^1.0.0
+  string_scanner: '>=0.0.0 <2.0.0'
+  typed_data: ^1.1.0
+
 dev_dependencies:
-  test: "^0.12.0"
+  test: '>=0.12.42 <2.0.0'