Fix the bug that mixes the blank in dependencies

ref: https://github.com/tokuhirom/App-scan_prereqs_cpanfile/issues/11
Checking in changes prior to tagging of version 0.21.

Changelog diff is:

diff --git a/Changes b/Changes
index 9c181b4..88aee20 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Perl-PrereqScanner-Lite

 {{$NEXT}}

+0.21 2014-09-05T15:22:30Z
+
+    - Fix the bug that mixes the blank in dependencies (Thank you for reporting @jscook)
+
 0.20 2014-07-31T07:59:24Z

     - Bug fix (#2)