upgrade deps

Both a "cargo update" and a bump of major versions of a few deps.
I left a few alone:

* base64 because some of the deps depend on 0.11 (and 0.9), so I don't
  want to pull in a third version (0.12).
* ring because libpasta depends on this version and I don't want to pull
  in two of them.
* time because it's not trivial. Last I checked, time 0.2 couldn't even
  do what I wanted at all.

I also made tokio use parking_lot, since I pull it in anyway.

db/build.rs

@@ -1,5 +1,5 @@
 // This file is part of Moonfire NVR, a security camera network video recorder.
-// Copyright (C) 2019 The Moonfire NVR Authors
+// Copyright (C) 2019-2020 The Moonfire NVR Authors
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -29,8 +29,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 fn main() {
-    //let out_dir = std::path::PathBuf::from(std::env::var("OUT_DIR").expect("OUT_DIR"));
-    protobuf_codegen_pure::Args::new()
+    protobuf_codegen_pure::Codegen::new()
         .out_dir(".")
         .inputs(&["proto/schema.proto"])
         .include("proto")