Prepare to publish for stable null safety (#104)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0675ed..7c15e3e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.8.0
+
+* Stable release for null safety.
+
 ## 1.8.0-nullsafety.3
 
 * Update SDK constraints to `>=2.12.0-0 <3.0.0` based on beta release
diff --git a/pubspec.yaml b/pubspec.yaml
index 36b7da8..67a0d51 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: path
-version: 1.8.0-nullsafety.3
+version: 1.8.0
 
 description: >-
   A string-based path manipulation library. All of the path operations you know