[BREAKING CHANGE] drop use of tindercrypt, and use ring directly

Cargo.lock

@@ -2253,12 +2253,6 @@ dependencies = [
  "tempfile",
 ]
 
-[[package]]
-name = "protobuf"
-version = "2.24.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db50e77ae196458ccd3dc58a31ea1a90b0698ab1b7928d89f644c25d72070267"
-
 [[package]]
 name = "pulldown-cmark"
 version = "0.7.2"
@@ -2967,6 +2961,7 @@ dependencies = [
  "log",
  "pretty_assertions",
  "proptest",
+ "ring",
  "rstest",
  "rusqlite",
  "serde",
@@ -2975,7 +2970,6 @@ dependencies = [
  "strum_macros 0.21.1",
  "tempfile",
  "thiserror",
- "tindercrypt",
  "ureq",
  "uuid",
 ]
@@ -3184,18 +3178,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "tindercrypt"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f34fd5cc8db265f27abf29e8a3cec5cc643ae9f3f9ae39f08a77dc4add375b6d"
-dependencies = [
- "protobuf",
- "rand 0.7.3",
- "ring",
- "thiserror",
-]
-
 [[package]]
 name = "tinyvec"
 version = "1.2.0"