travis, Dockerfile, appveyor, build: bump to Go 1.11

.travis.yml

@@ -14,11 +14,22 @@ matrix:
         - go run build/ci.go install
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
-    # These are the latest Go versions.
     - os: linux
       dist: trusty
       sudo: required
       go: 1.10.x
+      script:
+      - sudo modprobe fuse
+      - sudo chmod 666 /dev/fuse
+      - sudo chown root:$USER /etc/fuse.conf
+      - go run build/ci.go install
+      - go run build/ci.go test -coverage $TEST_PACKAGES
+
+    # These are the latest Go versions.
+    - os: linux
+      dist: trusty
+      sudo: required
+      go: 1.11.x
       script:
         - sudo modprobe fuse
         - sudo chmod 666 /dev/fuse
@@ -27,7 +38,7 @@ matrix:
         - go run build/ci.go test -coverage $TEST_PACKAGES
 
     - os: osx
-      go: 1.10.x
+      go: 1.11.x
       script:
         - unset -f cd # workaround for https://github.com/travis-ci/travis-ci/issues/8703
         - go run build/ci.go install
@@ -36,7 +47,7 @@ matrix:
     # This builder only tests code linters on latest version of Go
     - os: linux
       dist: trusty
-      go: 1.10.x
+      go: 1.11.x
       env:
         - lint
       git:
@@ -47,7 +58,7 @@ matrix:
     # This builder does the Ubuntu PPA upload
     - os: linux
       dist: trusty
-      go: 1.10.x
+      go: 1.11.x
       env:
         - ubuntu-ppa
       git:
@@ -66,7 +77,7 @@ matrix:
     - os: linux
       dist: trusty
       sudo: required
-      go: 1.10.x
+      go: 1.11.x
       env:
         - azure-linux
       git:
@@ -100,7 +111,7 @@ matrix:
       dist: trusty
       services:
         - docker
-      go: 1.10.x
+      go: 1.11.x
       env:
         - azure-linux-mips
       git:
@@ -144,7 +155,7 @@ matrix:
       git:
         submodules: false # avoid cloning ethereum/tests
       before_install:
-        - curl https://storage.googleapis.com/golang/go1.10.3.linux-amd64.tar.gz | tar -xz
+        - curl https://storage.googleapis.com/golang/go1.11.linux-amd64.tar.gz | tar -xz
         - export PATH=`pwd`/go/bin:$PATH
         - export GOROOT=`pwd`/go
         - export GOPATH=$HOME/go
@@ -161,7 +172,7 @@ matrix:
 
     # This builder does the OSX Azure, iOS CocoaPods and iOS Azure uploads
     - os: osx
-      go: 1.10.x
+      go: 1.11.x
       env:
         - azure-osx
         - azure-ios
@@ -190,7 +201,7 @@ matrix:
     # This builder does the Azure archive purges to avoid accumulating junk
     - os: linux
       dist: trusty
-      go: 1.10.x
+      go: 1.11.x
       env:
         - azure-purge
       git: