run tests with go 1.12

azure-pipelines.template.yml

@@ -9,7 +9,7 @@ jobs:
   - checkout: self
   - task: GoTool@0
     inputs:
-      version: '1.11.5'
+      version: '1.12'
   - script: |
       go test -p 1 -v -timeout 30m ./...
     workingDirectory: '$(Build.SourcesDirectory)'

azure-pipelines.yml

@@ -37,7 +37,7 @@ jobs:
   - checkout: self
   - task: GoTool@0
     inputs:
-      version: '1.11.5'
+      version: '1.12'
   - script: |
       bash ./testing/coverage/coverall
     workingDirectory: '$(Build.SourcesDirectory)'
@@ -59,7 +59,7 @@ jobs:
   - checkout: none
   - task: GoTool@0
     inputs:
-      version: '1.11.5'
+      version: '1.12'
   - script: |
       sudo apt-get -y update
       sudo apt-get -y install jq git file pkg-config zip g++ zlib1g-dev unzip python openssl