Bump MSRV

.travis.yml

@@ -1,7 +1,7 @@
 language: "rust"
 cache: "cargo"
 rust:
-  - 1.36.0
+  - 1.39.0
   - stable
   - beta
   - nightly
@@ -12,10 +12,7 @@ jobs:
 
 before_script:
   - rustup component add rustfmt
-  - |
+  - rustup component add clippy || true
-      if [ "$TRAVIS_RUST_VERSION" != "1.36.0" ]; then
-        rustup component add clippy || true
-      fi
   - |
       if [ "$TRAVIS_RUST_VERSION" == "stable" ]; then
         cargo install --force cargo-audit
@@ -28,7 +25,7 @@ script:
       fi
   - cargo fmt --all -- --check
   - |
-      if [ "$TRAVIS_RUST_VERSION" != "1.36.0" ] && ( rustup component list | grep -q clippy ); then
+      if ( rustup component list | grep -q clippy ); then
         cargo clippy --all --all-targets --all-features -- -D warnings
       fi
   - cargo build --all --verbose

README.md

@@ -7,7 +7,7 @@ These types can be shared by client and server code for all Matrix APIs.
 
 ## Minimum Rust version
 
-ruma-api requires Rust 1.36.0 or later.
+ruma-api requires Rust 1.39.0 or later.
 
 ## Documentation
 

ruma-api-macros/src/lib.rs

@@ -7,8 +7,6 @@
 
 #![deny(missing_copy_implementations, missing_debug_implementations)]
 #![allow(clippy::cognitive_complexity)]
-// Since we support Rust 1.36.0, we can't apply this suggestion yet
-#![allow(clippy::use_self)]
 #![recursion_limit = "256"]
 
 extern crate proc_macro;

src/lib.rs

@@ -12,8 +12,6 @@
 
 #![warn(rust_2018_idioms)]
 #![deny(missing_copy_implementations, missing_debug_implementations, missing_docs)]
-// Since we support Rust 1.36.0, we can't apply this suggestion yet
-#![allow(clippy::use_self)]
 
 use std::{
     convert::{TryFrom, TryInto},