Bump version to 0.2.52, update dependencies to fix nightly compilation

Cargo.lock

@@ -631,7 +631,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ffsend"
-version = "0.2.51"
+version = "0.2.52"
 dependencies = [
  "chbs 0.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ffsend"
-version = "0.2.51"
+version = "0.2.52"
 authors = ["Tim Visee <3a4fb3964f@sinenomine.email>"]
 license = "GPL-3.0"
 readme = "README.md"

README.md

@@ -712,7 +712,7 @@ documentation [here][send-encryption].
 ```
 $ ffsend help
 
-ffsend 0.2.51
+ffsend 0.2.52
 Tim Visee <3a4fb3964f@sinenomine.email>
 Easily and securely share files from the command line.
 A fully featured Firefox Send client.