Remove unused dependency and simple feature, update dependencies and fix some clippy lints

Cargo.toml

@@ -43,7 +43,7 @@ chashmap = "2.2.2"
 # A generic serialization/deserialization framework
 serde = "1.0.106"
 serde_derive = "1.0.106"
-serde_json = "1.0.51"
+serde_json = "1.0.52"
 
 # Logging
 log = "0.4.8"
@@ -57,14 +57,14 @@ diesel_migrations = "1.4.0"
 libsqlite3-sys = { version = "0.17.3", features = ["bundled"], optional = true }
 
 # Crypto library
-ring = "0.16.12"
+ring = "0.16.13"
 
 # UUID generation
 uuid = { version = "0.8.1", features = ["v4"] }
 
 # Date and time librar for Rust
 chrono = "0.4.11"
-time = "0.2.9"
+time = "0.2.14"
 
 # TOTP library
 oath = "0.10.2"
@@ -87,9 +87,6 @@ dotenv = { version = "0.15.0", default-features = false }
 # Lazy initialization
 once_cell = "1.3.1"
 
-# More derives
-derive_more = "0.99.5"
-
 # Numerical libraries
 num-traits = "0.2.11"
 num-derive = "0.3.0"
@@ -104,7 +101,7 @@ handlebars = { version = "3.0.1", features = ["dir_source"] }
 
 # For favicon extraction from main website
 soup = "0.5.0"
-regex = "1.3.6"
+regex = "1.3.7"
 data-url = "0.1.0"
 
 # Used by U2F, JWT and Postgres
@@ -116,15 +113,15 @@ percent-encoding = "2.1.0"
 idna = "0.2.0"
 
 # CLI argument parsing
-structopt = "0.3.13"
+structopt = "0.3.14"
 
 # Logging panics to logfile instead stderr only
 backtrace = "0.3.46"
 
 [patch.crates-io]
 # Use newest ring
-rocket = { git = 'https://github.com/SergioBenitez/Rocket', rev = 'dfc9e9aab01d349da32c52db393e35b7fffea63c' }
-rocket_contrib = { git = 'https://github.com/SergioBenitez/Rocket', rev = 'dfc9e9aab01d349da32c52db393e35b7fffea63c' }
+rocket = { git = 'https://github.com/SergioBenitez/Rocket', rev = '1010f6a2a88fac899dec0cd2f642156908038a53' }
+rocket_contrib = { git = 'https://github.com/SergioBenitez/Rocket', rev = '1010f6a2a88fac899dec0cd2f642156908038a53' }
 
 # Use git version for timeout fix #706
 lettre = { git = 'https://github.com/lettre/lettre', rev = '245c600c82ee18b766e8729f005ff453a55dce34' }