reporter v1.1.3

• Made package compatible back to R 3.6.
• Added GitHub Actions for prior R version checks.
• Figured out how to generate PDF files directly, instead of using
  Latex/Rmarkdown/MikTex/Pandoc. Will greatly reduce dependencies and make
  the reporter package much easier to install and test. Also makes it much
  easier to accurately render the PDF file.
• Allow user to add more than one title header().
• Made output_type parameter case insensitive.
• Added standard_eval parameter to define(), spanning_header(),
  and column_defaults() functions. These parameters will replace curly brace
  escape on those functions.
  Curly brace escape will remain active for backward compatibility, but is
  no longer documented.
• Fixed bug in RTF that was causing page overflows in LibreOffice Writer.
• Various other bug fixes.