meson: Make VS2022 builds distinct from VS2019

Make sure that we append the 'vs17' suffix to the DLL filenames rather than
appending 'vs16', so that VS2022 builds are distinct from the VS2019 ones.

meson.build

@@ -94,14 +94,17 @@ if cc.get_id() == 'msvc'
     # Visual Studio 2015 and later (19.xx.xxxxx or later): look at the minor version.
     # If minor version < 10: Visual Studio 2015,
     #    10 < minor version < 20: Visual Studio 2017,
-    #    20 < minor version: Visual Studio 2019
+    #    20 < minor version < 30: Visual Studio 2019,
+    #    30 < minor version: Visual Studio 2022
     mscsubver = cc.version().split('.')[1].to_int()
     if mscsubver < 10
       vsver = 14
     elif mscsubver < 20
       vsver = 15
-    else
+    elif mscsubver < 30
       vsver = 16
+    else
+      vsver = 17
     endif
   endif