fix validate overriden warning between jsonlite and shiny by scoping imports
fix validate overriden warning between jsonlite and shiny by scoping imports

rstudio/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,kevinykuo/sparklyr,rstudio/sparklyr,rstudio/sparklyr,rstudio/sparklyr,kevinykuo/sparklyr