Upgrade bzip2 to 1.0.6.
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 4b7081c..fb4efbb 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -5,7 +5,7 @@
<PythonExe>$(SolutionDir)\python.exe</PythonExe>
<externalsDir>..\..</externalsDir>
<sqlite3Dir>$(externalsDir)\sqlite-3.7.4</sqlite3Dir>
- <bz2Dir>$(externalsDir)\bzip2-1.0.5</bz2Dir>
+ <bz2Dir>$(externalsDir)\bzip2-1.0.6</bz2Dir>
<lzmaDir>$(externalsDir)\xz-5.0.3</lzmaDir>
<opensslDir>$(externalsDir)\openssl-1.0.0a</opensslDir>
<tcltkDir>$(externalsDir)\tcltk</tcltkDir>