Add toolchain and switch to Rust 2021 (#10)

* Add toolchain and switch to Rust 2021
* Fix tests toolchain

Author: chevdor

.github/workflows/quick-check.yml

@@ -54,6 +54,13 @@ jobs:
   quick_check-tests:
     runs-on: ubuntu-latest
     steps:
+      - name: Install Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
       - uses: actions/checkout@v2
 
       - name: Cargo test

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["chevdor <chevdor@gmail.com>"]
-edition = "2018"
+edition = "2021"
 name = "tera-cli"
 version = "0.2.0"
 description = "A command line utility written in Rust to render templates from json|toml|yaml && ENV, using the tera templating engine"

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "stable"
+components = [ "rustfmt", "clippy" ]
+profile = "minimal"