Add workflow to check for minimal versions

.github/workflows/rust.yml

@@ -17,6 +17,21 @@ jobs:
     - uses: dtolnay/rust-toolchain@1.52.0
     - run: cargo check
 
+  minimal-versions:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install tools
+      run: cargo install cargo-hack cargo-minimal-versions
+    - name: Check with minimal versions
+      run: cargo minimal-versions check
+    - name: Check with minimal versions (serialize)
+      run: cargo minimal-versions check --features serialize
+    - name: Check with minimal versions (encoding)
+      run: cargo minimal-versions check --features encoding
+    - name: Check with minimal versions (async-tokio)
+      run: cargo minimal-versions check --features async-tokio
+
   test:
     strategy:
       matrix:

Cargo.toml

@@ -24,7 +24,9 @@ memchr = "2.1"
 criterion = "0.4"
 pretty_assertions = "1.3"
 regex = "1"
-serde = { version = "1.0", features = ["derive"] }
+# #[serde(other)] allowed not only inside field_identifier since 1.0.79
+# serde does not follow semver in numbering and their dependencies, so we specifying patch here
+serde_derive = { version = "1.0.79" }
 serde-value = "0.7"
 tokio = { version = "1.21", default-features = false, features = ["macros", "rt"] }
 tokio-test = "0.4"