Don't deadlock on /* comments in the indented syntax

Closes #238

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.0-beta.5.3
+
+* Don't deadlock on `/*` comments in the indented syntax.
+
 ## 1.0.0-beta.5.2
 
 * Fix a bug where some colors would crash `compressed` mode.

lib/src/parse/sass.dart

@@ -218,13 +218,14 @@ class SassParser extends StylesheetParser {
         buffer.writeCharCode($space);
       }
 
+      loop:
       while (!scanner.isDone) {
         var next = scanner.peekChar();
         switch (next) {
           case $lf:
           case $cr:
           case $ff:
-            break;
+            break loop;
 
           case $hash:
             if (scanner.peekChar(1) == $lbrace) {

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.0.0-beta.5.2
+version: 1.0.0-dev
 description: A Sass implementation in Dart.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/sass/dart-sass