Bump coreth

Author: aaronbuchwald

scripts/build_coreth.sh

@@ -13,7 +13,7 @@ BUILD_DIR="$AVALANCHE_PATH/build" # Where binaries go
 PLUGIN_DIR="$BUILD_DIR/plugins" # Where plugin binaries (namely coreth) go
 BINARY_PATH="$PLUGIN_DIR/evm"
 
-CORETH_VER="v0.4.0-rc.4"
+CORETH_VER="v0.4.0-rc.6"
 
 CORETH_PATH="$GOPATH/pkg/mod/github.com/ava-labs/coreth@$CORETH_VER"
 

scripts/local.Dockerfile

@@ -2,7 +2,7 @@
 
 # This Dockerfile is meant to be used with the build_local_dep_image.sh script
 # in order to build an image using the local version of coreth
-FROM golang:1.13.4-buster
+FROM golang:1.15.5-buster
 
 RUN mkdir -p /go/src/github.com/ava-labs