Reapply "Increment version number to 1.3.0"

This reverts commit d8cd541.

Increment version number to 1.2.0

Fix up comment

Fix `is_on_disk()` for pkgload

Update CRAN comments

Increment version number to 1.1.4

Increment version number to 1.1.3

Increment version number to 1.1.2

Increment version number to 1.1.1

Increment version number to 1.1.0