Update MSVR in README.md (#356)

* Update README.md

Update MSVR in `README.md`

* Add `rust-version` in `Cargo.toml` and CI

* Forgot tests

.github/workflows/ci.yml

@@ -5,17 +5,17 @@ jobs:
   test_validator:
     name: Continuous integration
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        include:
-          - rust: 1.81.0 # MSRV, sometimes it changes because of compiler test issues
-          - rust: stable
     steps:
       - uses: actions/checkout@v3
+      - name: Extract Rust version from Cargo.toml
+        run: |
+          MSRV=$(sed -n 's/^rust-version = "\([^"]*\)"/\1/p' Cargo.toml)
+          echo "rust-version: $MSRV"
+          echo "MSRV=$MSRV" >> $GITHUB_ENV
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@stable # actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: ${{ matrix.rust }}
+          toolchain: ${{ env.MSRV }}
       - name: Cache dependencies
         uses: Swatinem/rust-cache@v2
       - name: Build System Info

Cargo.toml

@@ -1,3 +1,6 @@
 [workspace]
 resolver = "2"
 members = ["validator", "validator_derive", "validator_derive_tests"]
+
+[workspace.package]
+rust-version = "1.81"

README.md

@@ -24,8 +24,6 @@
 Macros 1.1 custom derive to simplify struct validation inspired by [marshmallow](http://marshmallow.readthedocs.io/en/latest/) and
 [Django validators](https://docs.djangoproject.com/en/1.10/ref/validators/).
 
-The minimum supported version is Rust 1.70.
-
 Installation:
 
 ```toml
@@ -402,4 +400,4 @@ For example, the following attributes all work:
 
 ## Features
 `derive` - This allows for the use of the derive macro.
-`derive_nightly_features` - This imports both derive as well as proc-macro-error2 nightly features. This allows proc-macro-error2 to emit extra nightly warnings.
+`derive_nightly_features` - This imports both derive as well as proc-macro-error2 nightly features. This allows proc-macro-error2 to emit extra nightly warnings.

validator/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/Keats/validator"
 keywords = ["validation", "api", "validator"]
 edition = "2021"
 readme = "../README.md"
+rust-version = { workspace = true }
 
 [dependencies]
 url = "2"

validator_derive/Cargo.toml

@@ -9,6 +9,7 @@ repository = "https://github.com/Keats/validator"
 keywords = ["validation", "api", "validator"]
 edition = "2021"
 readme = "../README.md"
+rust-version = { workspace = true }
 
 [lib]
 proc-macro = true

validator_derive_tests/Cargo.toml

@@ -3,6 +3,7 @@ name = "validator_derive_tests"
 version = "0.1.0"
 authors = ["Vincent Prouillet <[email protected]>"]
 edition = "2021"
+rust-version = { workspace = true }
 
 [features]
 default = ["test_ui"]