Patch release to fix major big where retrieval stopped due to parsing issues in `getAssemblySummary()`

New Features

in getSummaryFile() all columns of the assembly_summary.txt are now specified with names and correct data types (#92)

whenever the low-level function getKingdomAssemblySummary() was called by all get*() functions, due to an error in the assembly_summary.txt file for viruses where the total gene count was stored as character and not as integer (as is the case for all other assembly_summary.txt files), an error occurred stating that dplyr::bind_rows() cannot join column $X35 due to differences in data types. This has now been resolved by parsing the correct data types with readr(#92)