feat: update pcheck to 1.0.5 

feat: upgrade nodejs to 8.16.2 

feat: 1.0.4 add pg to runtime

feat: 1.0.3 1. runtime add sequelize package 2. buildpack add hackmd user

feat: lock npm version to 6.10.3 

feat: upgrade base image of builder-nodejx-8x to buildpack-deps:stret… …ch (debian 9)

feat: upgrade port-checker to 1.0.2 

fix: builder js-release-version 

fix: buildpack build fail