Add CI and declare earliest supported version

.github/workflows/ci.yml

@@ -0,0 +1,56 @@
+# "Borrowed" with permission from https://github.com/Jonxslays/piston_rs/blob/master/.github/workflows/ci.yml.
+# Thanks bud!
+
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  lint-and-format:
+    name: Lint and format
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Rust (stable)
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Run format check
+        run: cargo fmt -- --check
+
+      - name: Run clippy check
+        run: cargo clippy
+
+  test-and-build:
+    name: Test and build
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        rust_version: [1.31.0, 1.56.0, stable, nightly]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Rust (${{ matrix.rust_version }})
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust_version }}
+
+      - name: Run tests
+        run: cargo test
+
+      - name: Build package
+        run: cargo build

.github/workflows/rust.yml

@@ -1,22 +0,0 @@
-name: Build and test
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose

README.md

@@ -2,6 +2,8 @@
 
 An IRC (RFC1459) parser and formatter, built in Rust.
 
+`ircparser` should work on basically any Rust version, but the earliest version checked in the CI is v1.31 (the first version with Rust 2018 support).
+
 ## Setup
 
 To use the latest stable version of `ircparser`, add it to your Cargo.toml file like so: