Prep mime 2.0.0 for publish (#594)

pkgs/mime/CHANGELOG.md

diff --git a/pkgs/mime/CHANGELOG.md b/pkgs/mime/CHANGELOG.md
index 55332ba..fd5a249 100644
--- a/pkgs/mime/CHANGELOG.md
+++ b/pkgs/mime/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.0.0-wip
+## 2.0.0
 
 * **[Breaking]** `extensionFromMime(String mimeType)` returns `null` instead of `mimeType` for an unknown mime type.
 * Update `extensionFromMime` to return a default extension when a MIME type maps to multiple extensions.

pkgs/mime/pubspec.yaml

diff --git a/pkgs/mime/pubspec.yaml b/pkgs/mime/pubspec.yaml
index 2cfa75a..41b3842 100644
--- a/pkgs/mime/pubspec.yaml
+++ b/pkgs/mime/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mime
-version: 2.0.0-wip
+version: 2.0.0
 description: >-
   Utilities for handling media (MIME) types, including determining a type from
   a file extension and file contents.