Fix the Chocolatey version of the Dart SDK (#389)

Dev SDKs changed from 2.0.0.XX-dev to 2.0.0.XX-dev-Y.

Author: nex3

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.7.3
+
+* No user-visible changes.
+
 ## 1.7.2
 
 * Add a deprecation warning for `@-moz-document`, except for cases where only an

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.7.2
+version: 1.7.3
 description: A Sass implementation in Dart.
 author: Dart Team <[email protected]>
 homepage: https://github.com/sass/dart-sass

tool/grind/chocolatey.dart

@@ -47,7 +47,8 @@ xml.XmlDocument _nuspec() {
     assert(dartVersion.preRelease[0] == "dev");
     assert(dartVersion.preRelease[1] is int);
     sdkVersion = "${dartVersion.major}.${dartVersion.minor}."
-        "${dartVersion.patch}.${dartVersion.preRelease[1]}-dev";
+        "${dartVersion.patch}.${dartVersion.preRelease[1]}-dev-"
+        "${dartVersion.preRelease[2]}";
   } else {
     sdkVersion = dartVersion.toString();
   }