Bump dependency on aeson.

Signed-off-by: Magnus Therning <magnus@therning.org>
Add command line option for GHC version and release.

The only two commands that need them are `add` and `pkgbuild`.

Closes #9

Signed-off-by: Magnus Therning <magnus@therning.org>
Change help texts to start with upper case.

This way they match the help message built into optparse-applicative.

Signed-off-by: Magnus Therning <magnus@therning.org>
Remove static list of GHC packages.

Closes #8

Signed-off-by: Magnus Therning <magnus@therning.org>
Bump to proper dev version.

Better late than never.

Signed-off-by: Magnus Therning <magnus@therning.org>
Improve the error message for missing index file.

Close #10

Signed-off-by: Magnus Therning <magnus@therning.org>
README: clarify syntax of <pkg name>

Signed-off-by: Linus Arver <linusarver@gmail.com>
README: fix typo

Signed-off-by: Linus Arver <linusarver@gmail.com>