Prepare for v1.6.0 release

Bump version and set a tag

Test plan:
* task test passes
* task build passes
* task build:release produces binaries

Bump version - prepare for release

Test plan:
* Compile into a binary and issue
  ain -v. Verify version number
  is now 1.5.0

Ain is in homebrew-core now

Remove my homebrew-tools repo
and use the main homebrew-core
Formulae.

Ain has been in the homebrew-core
for some months now, switch
over the installation
process.

Test plan:
* docker run .it homebrew/brew:latest bash
  brew install ain.
  ain -v.

Bump main to v1.4.0

It's release time!

Test plan:
* go run cmd/ain/main.go version
  prints v1.4.0.

Prepare for release: bump version to 1.3.0

Test plan:
* N/A

Add clarification on quoting and file names

To the README.md

Test plan:
* N/A

Bump ain version number

Test plan:
* Run ain -v and verify it says
  v1.2.1

Ooops: bug-fix, host is nil if url is invalid

If the url fails, the host is nil
(and the error is non-nil). Don't
try to set the query string
on a nil-host as it'll segfault.

Accumulate the fatals and set the
host only if there are no fatals.

Test plan:
* Have an [Host] with an illegal url
  (such as http://localhost:300/page:3).
  Verify error on host and no segfault.

Bump ain version output to 1.1.0

Test plan:
* Run ain -v and verify output is
  v1.1.0

Add homebrew pipeline to .goreleaser.yml

Get onto mac and the popular homebrew.

Create a release with this commit and
push the ain.rb file to the homebrew-tools
repo.

Test plan:
* Run docker run --rm -it --user 1000 homebrew/brew,
  brew tap jonaslu/tools
  brew install ain
  Verify installation works and binary is
  accessible after installation.
* brew uninstall ain, brew untap jonaslu/tools
  cleans up and works.