Merge pull request #549 from Random-Liu/fix-build

Update travis ubuntu version to xenial, and golang to 1.16.

.travis.yml

@@ -1,19 +1,18 @@
 os:
  - linux
 sudo: required
-dist: trusty
+dist: xenial
 language: go
 go:
- - "1.11"
- - "1.12"
+ - "1.16"
  - master
 env:
 - GO111MODULE=on
 services:
  - docker
 before_install:
  - sudo apt-get -qq update
- - sudo apt-get install -y libsystemd-journal-dev
+ - sudo apt-get install -y libsystemd-dev
 install:
  - mkdir -p $HOME/gopath/src/k8s.io
  - mv $TRAVIS_BUILD_DIR $HOME/gopath/src/k8s.io/node-problem-detector