Bump unparser from 0.4.8 to 0.4.9

Bumps [unparser](https://github.com/mbj/unparser) from 0.4.8 to 0.4.9.
- [Release notes](https://github.com/mbj/unparser/releases)
- [Changelog](https://github.com/mbj/unparser/blob/master/Changelog.md)
- [Commits](mbj/unparser@v0.4.8...v0.4.9)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -18,12 +18,12 @@ GEM
     adamantium (0.2.0)
       ice_nine (~> 0.11.0)
       memoizable (~> 0.4.0)
-    anima (0.3.1)
+    anima (0.3.2)
       abstract_type (~> 0.0.7)
       adamantium (~> 0.2)
       equalizer (~> 0.0.11)
     ast (2.4.1)
-    concord (0.1.5)
+    concord (0.1.6)
       adamantium (~> 0.2.0)
       equalizer (~> 0.0.9)
     debase (0.2.4.1)
@@ -77,7 +77,7 @@ GEM
       simplecov-html (~> 0.11)
     simplecov-html (0.12.2)
     thread_safe (0.3.6)
-    unparser (0.4.8)
+    unparser (0.4.9)
       abstract_type (~> 0.0.7)
       adamantium (~> 0.2.0)
       anima (~> 0.3.1)