Fix CI build by temporarily remove RPC tests (polkadot-evm#6)

* Fix CI build by temporarily remove RPC tests

* Update substrate head

* Update cargo lock

* Use specific nightly version in init.sh

* Specify nightly version for wasm32 target

* Update substrate pin

* Print out cargo and rustc version in CI init

* Set env WASM_BUILD_TOOLCHAIN in CI directly

* Update cargo lock

* Fix env format in Github Actions

* Fix runtime compile

.github/workflows/rust.yml

@@ -14,7 +14,14 @@ jobs:
     - name: Submodules
       run: git submodule update --init --recursive
     - name: Init
-      run: scripts/init.sh
+      run: |
+        scripts/init.sh
+        cargo --version
+        rustc --version
+        cargo +$WASM_BUILD_TOOLCHAIN --version
+        rustc +$WASM_BUILD_TOOLCHAIN --version
+      env:
+        WASM_BUILD_TOOLCHAIN: nightly-2020-05-14
     - name: Build
       run: cargo build --verbose --all
     - name: Run tests