viafr 0.2.0

• Fix problems with upgrade of package tibble to version 3.0.0

viafr 0.1.0

• Develop basic functionality (viaf_get(), viaf_search(), and viaf_suggest())
• Implement unit testing with Travis and AppVeyor as well as Code Coverage tracking
• Add VIAF data sets (authorities and name_types)
• Add NEWS.md file to track changes to the package
• Add LICENSE.md and CODE_OF_CONDUCT.md