Update nitrokey crate to 0.4.0

This change finally updates the version of the nitrokey crate that we
consume to 0.4.0. Along with that we update rand_core, one of its
dependencies, to 0.5.1. Further more we add cfg-if in version 0.1.10 and
getrandom in version 0.1.13, both of which are now new (non-development)
dependencies.

Import subrepo nitrokey/:nitrokey at e81057037e9b4f370b64c0a030a725bc6bdfb870
Import subrepo cfg-if/:cfg-if at 4484a6faf816ff8058088ad857b0c6bb2f4b02b2
Import subrepo getrandom/:getrandom at d661aa7e1b8cc80b47dabe3d2135b3b47d2858af
Import subrepo rand/:rand at d877ed528248b52d947e0484364a4e1ae59ca502

1 files changed, 30 insertions, 0 deletions

diff --git a/rand/rustfmt.toml b/rand/rustfmt.toml
new file mode 100644
index 0000000..6b2aba3
--- /dev/null
+++ b/rand/rustfmt.toml
@@ -0,0 +1,30 @@
+# This rustfmt file is added for configuration, but in practice much of our
+# code is hand-formatted, frequently with more readable results.
+
+# Comments:
+normalize_comments = true
+wrap_comments = false
+format_doc_comments = true
+comment_width = 90      # small excess is okay but prefer 80
+
+# Arguments:
+use_small_heuristics = "max"
+fn_args_density = "compressed"
+fn_single_line = false
+overflow_delimited_expr = true
+where_single_line = true
+
+# enum_discrim_align_threshold = 20
+# struct_field_align_threshold = 20
+
+# Compatibility:
+edition = "2018"        # we require compatibility back to 1.32.0
+
+# Misc:
+blank_lines_upper_bound = 2
+reorder_impl_items = true
+# report_todo = "Unnumbered"
+# report_fixme = "Unnumbered"
+
+# Ignored files:
+ignore = []