ENH: Update compiler versions for C++14

Following pull request InsightSoftwareConsortium/ITK#2563
"ENH: Upgrade ITK from C++11 to C++14"

Suggested by Jon Haitz Legarreta Gorroño

Author: N-Dekker

SoftwareGuide/Latex/Introduction/Installation.tex

@@ -33,8 +33,8 @@ \chapter{Configuring and Building ITK}
 %% to ensure that support is maintained.
 %%
 \begin{itemize}
-\item GCC 4.8 and newer
-\item Visual Studio 2015, 2017, 2019, toolsets 14.x, 15.0, 16.0
+\item GCC 5.1 and newer
+\item Visual Studio 2017 and 2019, toolsets v141 and v142
 \item Apple Clang 7.0 and newer
 \item Clang 6 and newer
 \end{itemize}