Release 0.6.4 (#485)

* update: bump substrate version

* update: bump all version

* clean: runtime

* clean: command

* update: rpc

* update: common runtime

* update: crab runtime

* remove: unused feature

* update: new ethereum backing

* update: types

* temp: dependencies

* update: primitives

* update: service

* update: cli

* add: cross compile thing

* remove: unused utilities

* fix: compile

* update: toolchain

* update: dependencies

* remove: unused pallet

* update: dependencies

* support: compile for arm

.gitignore

@@ -1,11 +1,5 @@
 # Cross Compile Things
-osxcross
-darwin-x86_64
-darwin-x86_64.tar.gz
-linux-x86_64
-linux-x86_64.tar.gz
-windows-x86_64
-windows-x86_64.tar.gz
+wasm
 
 # IDE Things
 .idea

.maintain/docker/Dockerfile.arm-unknown-linux-gnueabihf

@@ -0,0 +1,3 @@
+FROM rustembedded/cross:arm-unknown-linux-gnueabihf
+
+RUN apt update && apt upgrade -y && apt install -y clang llvm libclang-dev

.maintain/docker/Dockerfile.x86_64-unknown-linux-gnu

@@ -0,0 +1,3 @@
+FROM rustembedded/cross:x86_64-unknown-linux-gnu
+
+RUN apt update && apt upgrade -y && apt install -y clang llvm libclang-dev

.travis.yml

@@ -1,39 +1,38 @@
 language: rust
-rust: nightly-2020-05-14
+rust: nightly
 
 branches:
-    only:
-        - master
-        - develop
+  only:
+    - master
+    - develop
 
 env:
-    global:
-        - RUST_BACKTRACE=1
+  global:
+    - RUST_BACKTRACE=1
 
 before_install:
-    # Check how much space we've got on this machine.
-    - df -h
-    - rustup target add wasm32-unknown-unknown --toolchain nightly-2020-05-14
-
+  # Check how much space we've got on this machine.
+  - df -h
+  - rustup target add wasm32-unknown-unknown --toolchain nightly
 
 jobs:
   include:
     - stage: Check & Prepare
       script: .maintain/ci/fmt_script.sh
 
     - stage: Build
-      env: RUST_TOOLCHAIN=nightly-2020-05-14 TARGET=native
+      env: RUST_TOOLCHAIN=nightly TARGET=native
       script: .maintain/ci/build_script.sh
 
     - stage: Build
-      env: RUST_TOOLCHAIN=nightly-2020-05-14 TARGET=wasm
+      env: RUST_TOOLCHAIN=nightly TARGET=wasm
       script: .maintain/ci/build_script.sh
 
     # over the time limitation, so we comment this
     # - stage: Overall Test
-    #   env: RUST_TOOLCHAIN=nightly-2020-05-14 TARGET=native
+    #   env: RUST_TOOLCHAIN=nightly TARGET=native
     #   script: .maintain/ci/test_script.sh
 
 after_script:
-    # Check how much free disk space left after the build
-    - df -h
+  # Check how much free disk space left after the build
+  - df -h