Update target toolchain to wasm-5.7-SNAPSHOT-2022-09-18-a

Author: kateinoigakukun

Dockerfile

@@ -16,7 +16,7 @@ RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && ap
   rm -r /var/lib/apt/lists/*
 
 ENV CARTON_ROOT=/root/.carton
-ENV CARTON_DEFAULT_TOOLCHAIN=wasm-5.6.0-RELEASE
+ENV CARTON_DEFAULT_TOOLCHAIN=wasm-5.7-SNAPSHOT-2022-09-18-a
 
 RUN mkdir -p $CARTON_ROOT/sdk && \
   mkdir -p $CARTON_ROOT/sdk/$CARTON_DEFAULT_TOOLCHAIN && \

Sources/CartonHelpers/DefaultToolchain.swift

@@ -12,4 +12,4 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-public let defaultToolchainVersion = "wasm-5.6.0-RELEASE"
+public let defaultToolchainVersion = "wasm-5.7-SNAPSHOT-2022-09-18-a"