Support the latest pkg:http, prepare for release (#9)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 21f31cc..bff910f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.4
+
+* Support the latest `pkg:http` release.
+
 ## 1.0.3
 
 * Set max SDK version to <3.0.0, and adjusted other dependencies.
diff --git a/analysis_options.yaml b/analysis_options.yaml
deleted file mode 100644
index 2e6cdca..0000000
--- a/analysis_options.yaml
+++ /dev/null
@@ -1 +0,0 @@
-analyzer:
diff --git a/pubspec.yaml b/pubspec.yaml
index 20eaa8e..343bf86 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,15 +1,15 @@
 name: http_throttle
-version: 1.0.3
+version: 1.0.4
 
 description: HTTP client middleware that throttles requests.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/http_throttle
 
 environment:
-  sdk: '>=2.0.0-dev.17.0 <3.0.0'
+  sdk: '>=2.0.0 <3.0.0'
 
 dependencies:
-  http: '>=0.9.0 <0.12.0'
+  http: '>=0.9.0 <0.13.0'
   pool: '>=1.0.0 <2.0.0'
 
 dev_dependencies: