updated compiler versions for the latest C++ versions

Author: Sebastien Ponce

Diff for: talk/introduction/history.tex

@@ -113,7 +113,8 @@
             11 & $\geq$4.8 & $\geq$3.3\\
             14 & $\geq$4.9 & $\geq$3.4\\
             17 & $\geq$7.3 & $\geq$5\\
-            20 & $>$11  & $>$12 \\
+            20 & $>$11, 14  & $>$12,18 \\
+            23 & $>$14  & $>$17,18 \\
           \end{tabular}
           \caption{Minimum versions of gcc and clang for a given \cpp version}
         \end{center}