feat(version): declare minimum supported rust version at 1.56.0 (#209)

Co-authored-by: Benjamin Lee <benjamin@computer.surgery>

Author: olivia-fl

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        rust: [1.54.0, stable]
+        rust: [1.56.0, stable]
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:

Cargo.toml

@@ -9,6 +9,7 @@ documentation = "https://docs.rs/miette"
 license = "Apache-2.0"
 readme = "README.md"
 edition = "2018"
+rust-version = "1.56.0"
 exclude = ["images/", "tests/", "miette-derive/"]
 
 [dependencies]