Update prettytable-rs-0.8.0 to prettytable-rs-0.10.0

Summary:
`prettytable-rs-0.8.0` has unsafe code ([phsym/prettytable-rs#145][])
that is failing the sanitizers. This is fixed in
`prettytable-rs-0.10.0`. Updating `prettydiff` as well because it too
depends on `prettytable-rs-0.8.0`.

[phsym/prettytable-rs#145]: phsym/prettytable-rs#145

Reviewed By: dtolnay

Differential Revision: D43107083

fbshipit-source-id: a7887669201cab5fcf836bd0ed9d14c71180d92b

Cargo.toml

@@ -6,6 +6,7 @@ members = [
   "detcore",
   "detcore-model",
   "detcore/tests/testutils",
+  "flaky-tests",
   "hermit-cli",
   "hermit-verify",
   "tests",