Update dependencies to LTS 14.5

[sshine]

• Bump version from 0.0.3 to 0.1.0.
• Update dependency on 'aeson' from <1.3 to <1.5.
• Update dependency on 'th-abstraction from <0.3 to <0.4.
• Update dependency on 'lens' from <4.17 to <4.18.
• Remove dependency on 'base-compat'.

As it's a little unclear why 'base-compat' was necessary, it's estimated
that it no longer is, since it compiles without and we are in the future
now.

The PVP states:

Note that modifying imports or depending on a newer version of another
package may cause extra non-orphan instances to be exported and thus
force a minor version change.

As I am unsure if any of the bumped dependencies cause extra non-orphan
instances, but all of them bump the minor version, a safe choice is to
bump this package's minor version.

[sshine]

I noticed there wasn't a stack.yaml, would you like there to be one?

It might look like:

resolver: lts-14.5
packages:
  - .

[sshine]

The 7.10.2, 8.0.2, 8.2.2 builds break because of import Data.Monoid.

I'm curious as to how backwards compatible you want the package to be. Until I know, I'm assuming 8.8, 8.6 and 8.4 as the 3 release policy means that CPP can be avoided.

[sshine]

It turns out that aeson-diff depends on base <4.13, so that needs an upstream bump to work on GHC 8.8.1. I'll look at earlier GHC versions than 8.4.4 once I get this working.

[sshine]

The package is currently in a state where it builds successfully on 7.10.2--8.6.5.

I have a bit of cleaning up to do in terms of adding features back to .travis.yml.

I'd like to ensure that we check the necessary things for being able to add this package to Stackage.

Notice that I've reduced build times: this CI build uses 18m6s, 23m30s, 5m5s compared to this CI build which uses 2m15s, 2m32s, 2m7s, 2m36s, 2m16s, 3m16s.

[sshine]

In the process of modernizing .travis.yml I've removed checks for haddock and sdist generation that need to be put back.

[kuribas]

Thanks for your work!