Increment version number to 1.6.1

Increment version number to 1.6.0

Bump to version 1.5.2

Increment version number to 1.5.1

Last fix

Increment version number

Increment version number

Increment version number

Move skip_if_not_utf8 to the helper

This avoids a hard testthat dependency

Tweak test

The previous test would not work if the home directory was on a
different windows drive than the test directory