Release http_parser 4.1.2 (#1439)

pkgs/http_parser/CHANGELOG.md

diff --git a/pkgs/http_parser/CHANGELOG.md b/pkgs/http_parser/CHANGELOG.md
index d66d5d6..4312f63 100644
--- a/pkgs/http_parser/CHANGELOG.md
+++ b/pkgs/http_parser/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 4.1.2-wip
+## 4.1.2
 
 * Fixed a bug where parsing quoted header values could require a regex to
   backtrack

pkgs/http_parser/pubspec.yaml

diff --git a/pkgs/http_parser/pubspec.yaml b/pkgs/http_parser/pubspec.yaml
index 95c85b6..5b3d521 100644
--- a/pkgs/http_parser/pubspec.yaml
+++ b/pkgs/http_parser/pubspec.yaml
@@ -1,5 +1,5 @@
 name: http_parser
-version: 4.1.2-wip
+version: 4.1.2
 description: >-
   A platform-independent package for parsing and serializing HTTP formats.
 repository: https://github.com/dart-lang/http/tree/master/pkgs/http_parser