Bump some versions to get num-traits support for i128.

--- a/Cargo.toml
+++ b/Cargo.toml:wq
@@ -28,7 +28,8 @@
 rand = "0.3"
 unix_socket = "0.5"
 unicode-segmentation = "1.2"
-parse_int = "0.5"
+parse_int = "0.6"
+ndarray = "0.15.4"
 
 unsegen = "0.3"
 unsegen_signals = "0.3"