Update compiler (#725)

* update compiler to recent nightly

* cargo fmt

* fix clippy

but ructe code is still complaining

* update circleci and rocket_csrf

* fix last clippy problems

* cargo fmt

* fix build issue

was caused be improper handling of recursive template (comment) by old ructe, which is fixed on newer version

plume-models/src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(try_trait)]
 #![feature(never_type)]
-#![feature(custom_attribute)]
 #![feature(proc_macro_hygiene)]
 
 extern crate activitypub;
@@ -256,6 +255,7 @@ macro_rules! insert {
     ($table:ident, $from:ident, |$val:ident, $conn:ident | $( $after:tt )+) => {
         last!($table);
 
+        #[allow(dead_code)]
         pub fn insert(conn: &crate::Connection, new: $from) -> Result<Self> {
             diesel::insert_into($table::table)
                 .values(new)
@@ -282,6 +282,7 @@ macro_rules! insert {
 /// ```
 macro_rules! last {
     ($table:ident) => {
+        #[allow(dead_code)]
         pub fn last(conn: &crate::Connection) -> Result<Self> {
             $table::table
                 .order_by($table::id.desc())