chore: Bump msrv to 1.60 (#1171)

.github/workflows/CI.yml

@@ -1,5 +1,8 @@
 name: CI
 
+env:
+  MSRV: "1.60"
+
 on:
   push:
     branches:
@@ -45,6 +48,24 @@ jobs:
   #   - uses: actions/checkout@v1
   #   - uses: EmbarkStudios/cargo-deny-action@v1
 
+  msrv:
+    name: Check MSRV (${{ env.MSRV }})
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Install Rust (${{ env.MSRV }})
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.MSRV }}
+          override: true
+      - name: Check
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all --all-targets --all-features
+
   test:
     runs-on: ${{ matrix.os }}
     strategy:

README.md

@@ -45,7 +45,7 @@ For IntelliJ IDEA users, please refer to [this](https://github.com/intellij-rust
 
 ### Rust Version
 
-`tonic` currently works on Rust `1.56` and above as it requires support for the 2018 edition.
+`tonic` currently works on Rust `1.60` and above as it requires support for the 2018 edition.
 
 ```bash
 $ rustup update