[ANN] PrettyTables.jl v3.5: One Table Specification, Six Back Ends

PrettyTables.jl v3.5 adds backend-agnostic table formats and styles. Until now, making a table beautiful meant configuring backend-specific objects (TextTableFormat, LatexTableStyle, and so on), so switching back ends required rewriting the whole configuration. The new TableFormat, TableStyle, and LineStyle objects describe the table lines and decorations once, and every back end converts them to its native representation. Combined with the other backend-agnostic features of v3 (Face-based hig...