Fix minimum dependency versions and features and check them in CI (#557)

* Fix minimum dependency versions and features and check them in CI

* Update CHANGELOG

* Enable std feature for serde_json

* Auto-fix clippy lints in the fuzzer

.github/workflows/ci.yaml

@@ -12,19 +12,55 @@ on:
     - cron: '0 0 * * 0'
 
 jobs:
+  lock:
+    name: Cargo.lock
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the Repository
+        uses: actions/checkout@v3
+      - name: Install the Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          profile: minimal
+          override: true
+      - name: Generate the minimum version lockfile
+        run: |
+          cargo update -Z minimal-versions
+          cargo update -Z direct-minimal-versions
+          mv Cargo.lock Cargo.lock.min
+      - name: Generate the current version lockfile
+        run: cargo update
+      - name: Upload the Cargo lockfiles
+        uses: actions/upload-artifact@v4
+        with:
+          name: Cargo.lock
+          path: |
+            Cargo.lock
+            Cargo.lock.min
+
   tests:
     name: Tests
     runs-on: ubuntu-latest
+    needs: lock
 
     strategy:
       matrix:
         rust: [1.64.0, stable, nightly]
+        lock: ["Cargo.lock", "Cargo.lock.min"]
 
     steps:
       - uses: actions/checkout@v3
+      - name: Download the Cargo lockfiles
+        uses: actions/download-artifact@v4
+        with:
+          name: Cargo.lock
+      - name: Rename ${{ matrix.lock }} to Cargo.lock
+        run: mv ${{ matrix.lock }} Cargo.lock
+        if: ${{ matrix.lock != 'Cargo.lock' }}
       - uses: ./.github/actions/setup
         with:
-          key: test-${{ matrix.rust }}
+          key: test-${{ matrix.rust }}-${{ matrix.lock }}
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ matrix.rust }}

CHANGELOG.md

@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Fix issue [#556](https://github.com/ron-rs/ron/issues/556) and update minium dependency versions ([#557](https://github.com/ron-rs/ron/pull/557))
+
 ## [0.9.0] - 2023-09-??
 
 ### API Changes

Cargo.toml

@@ -25,21 +25,24 @@ integer128 = []
 
 [dependencies]
 # FIXME @juntyr remove base64 once old byte strings are fully deprecated
-base64 = "0.22"
-bitflags = { version = "2.0", features = ["serde"] }
-indexmap = { version = "2.0", features = ["serde"], optional = true }
+base64 = { version = "0.22", default-features = false, features = ["std"] }
+bitflags = { version = "2.1", default-features = false, features = ["serde"] }
+indexmap = { version = "2.0", default-features = false, features = ["std", "serde"], optional = true }
 # serde supports i128/u128 from 1.0.60 onwards
-serde = "1.0.60"
-serde_derive = "1.0"
-unicode-ident = "1.0"
+# serde's IntoDeserializer impls suport new constructor from 1.0.139 onwards
+# serde's adjacently tagged enums support integer tags from 1.0.181 onwards
+serde = { version = "1.0.181", default-features = false, features = ["std"] }
+serde_derive = { version = "1.0.181", default-features = false }
+unicode-ident = { version = "1.0", default-features = false }
 
 [dev-dependencies]
-serde = { version = "1.0", features = ["derive"] }
-serde_bytes = "0.11"
-serde_json = "1.0"
-option_set = "0.2"
-typetag = "0.2"
-bytes = { version = "1.3", features = ["serde"] }
+serde = { version = "1.0.181", default-features = false, features = ["std", "derive"] }
+serde_bytes = { version = "0.11", default-features = false, features = ["std"] }
+# serde_json supports the std feature from 1.0.60 onwards
+serde_json = { version = "1.0.60", default-features = false, features = ["std"] }
+option_set = { version = "0.2", default-features = false }
+typetag = { version = "0.2", default-features = false }
+bytes = { version = "1.3", default-features = false, features = ["serde"] }
 
 [package.metadata.docs.rs]
 features = ["integer128", "indexmap"]