Update doc to 2.2.0

rocky · rocky · commit 9f550217df86 · 2021-05-15T14:47:51.000-04:00
diff --git a/docs/mathics-latest.pdf b/docs/mathics-latest.pdf
@@ -1 +1 @@
-mathics-2.1.0.pdf
+mathics-2.2.0.pdf
