fix: bump prost-build to 0.10 to solve protobuf version incompatibility

Should help solve the issue described in [1] by effectively upgrading
protoc from 3.15.8 to 3.19.4. However, from now on either protoc needs
to already be installed on the system to install, or prost-build needs
to have the tools available to build it from source (needs CMake an
C++ toolchain).

[1] protocolbuffers/protobuf#10051

.github/workflows/python.yml

@@ -21,6 +21,10 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: recursive
+    - name: Install latest protoc
+      uses: arduino/setup-protoc@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Install sdist-only dependencies
       if: ${{ matrix.type == 'sdist' }}
       uses: actions-rs/toolchain@v1

py/Cargo.toml

@@ -33,6 +33,6 @@ substrait-validator = { path = "../rs", version = "0.0.1" }
 pyo3 = { version = "0.15.1", features = ["extension-module"] }
 
 [build-dependencies]
-prost-build = "0.9"
+prost-build = "0.10"
 walkdir = "2"
 dunce = "1"

rs/Cargo.toml

@@ -12,8 +12,8 @@ include = ["src", "build.rs", "README.md"]
 [dependencies]
 
 # Prost is used to deal with protobuf serialization and deserialization.
-prost = "0.9"
-prost-types = "0.9"
+prost = "0.10"
+prost-types = "0.10"
 
 # Prost doesn't generate any introspection stuff, so we hack that stuff in with
 # our own procedural macros.
@@ -80,7 +80,7 @@ percent-encoding = "2.1"
 [build-dependencies]
 
 # Used for generating Rust structs from the protobuf definitions.
-prost-build = "0.9"
+prost-build = "0.10"
 
 # Used to automatically find all protobuf files.
 walkdir = "2"

tests/Cargo.toml

@@ -19,5 +19,5 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 walkdir = "2"
 glob = "0.3"
-prost-build = "0.9"
+prost-build = "0.10"
 rayon = "1.5"