Mark path's SDK constraint lower bound as 1.0.0 exactly.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//81843003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/path@30679 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/pubspec.yaml b/pubspec.yaml
index a391d96..491c3bc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,4 +10,4 @@
 dev_dependencies:
   unittest: ">=0.9.0 <0.10.0"
 environment:
-  sdk: ">=1.0.0+3.r30188 <2.0.0"
+  sdk: ">=1.0.0 <2.0.0"