updated changelog for Julia project flag (#157, #158)

Author: gpoore

pythontex/pythontex.dtx

@@ -171,6 +171,7 @@
 % \begin{changelog}{v0.18}{2021/??/??}
 % \begin{itemize}
 % \item \texttt{\string\inputpygments} now checks inputted files for modification, so that typeset code will correctly update when the source is changed (\#162).
+% \item Julia now uses project flag ``\texttt{-{}-project=@.}'' (\#157, \#158).
 % \item Fixed bug in processing Pygments options (\texttt{pygopt}) when a key is used without a value (\#181).
 % \item Some error handling for Windows was incompatible with other operating systems: replaced checks for WindowsError with checks for OSError (\#177).
 % \item Rust support is now compatible with document or working directory paths that contain spaces (\#167).