Bump incremental version after adding allocation routines. (#9)

* Bump incremental version after adding allocation routines.

* Changelog

* versions
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9aa9004..58f9eff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.1.2
+
+* Adds top-level `allocate<T>()` and `free()` methods which can be used as a
+  replacement for the deprecated `Pointer.allocate<T>()` and `Pointer.free()`
+  members in `dart:ffi`.
+
 ## 0.1.1+2
 
 * Expand readme
@@ -14,4 +20,4 @@
 
 ## 0.1.0
 
-* Initial release supporting Utf8
\ No newline at end of file
+* Initial release supporting Utf8
diff --git a/pubspec.yaml b/pubspec.yaml
index fd7865a..2bfef40 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: ffi
-version: 0.1.1+2
+version: 0.1.3-dev.1
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/ffi
 description: Utilities for working with Foreign Function Interface (FFI) code.
 
 environment:
-  sdk: '>=2.5.0 <3.0.0'
+  sdk: '>=2.6.0-dev.6.0 <3.0.0'
 documentation: https://pub.dev/documentation/ffi/
 
 dependencies: