Test with minimal versions (#106)

.github/workflows/minimal-versions.yml

@@ -0,0 +1,24 @@
+name: minimal-versions-build
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+jobs:
+  minimal-versions-build:
+    name: Minimal versions build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v2
+      - name: Fetch toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+      - name: Test with minimal versions
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -Z minimal-versions --manifest-path=num_enum/Cargo.toml
+          toolchain: nightly

num_enum/Cargo.toml

@@ -32,7 +32,7 @@ maintenance = { status = "passively-maintained" }
 num_enum_derive = { version = "0.5.10", path = "../num_enum_derive", default-features = false }
 
 [dev-dependencies]
-anyhow = "1"
-rustversion = "1.0"
-trybuild = "1.0.31"
-walkdir = "2.3.1"
+anyhow = "1.0.14"
+rustversion = "1"
+trybuild = "1.0.49"
+walkdir = "2"

num_enum_derive/Cargo.toml

@@ -34,4 +34,4 @@ features = ["external_doc"]
 proc-macro2 = "1"
 proc-macro-crate = { version = "1", optional = true }
 quote = "1"
-syn = { version = "1", features = ["parsing"] }
+syn = { version = "1.0.15", features = ["parsing"] }