Bump golang.org/x/sync from 0.5.0 to 0.6.0

Bumps [golang.org/x/sync](https://github.com/golang/sync) from 0.5.0 to 0.6.0.
- [Commits](golang/sync@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: golang.org/x/sync
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Improve usage message and random seed

* The usage message for --help has been made much more
comphrensive
* rules.yaml is now the default, removing one argument
from running the tool
* The method for random seeds has been improved according to
a deprecation

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Cancel inflight builds

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Bump golang.org/x/sync from 0.1.0 to 0.2.0

Bumps [golang.org/x/sync](https://github.com/golang/sync) from 0.1.0 to 0.2.0.
- [Commits](golang/sync@v0.1.0...v0.2.0)

---
updated-dependencies:
- dependency-name: golang.org/x/sync
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Ignore formatting for vendor

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Add cokerfile / publishing of image

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Add a shorter timeout and close connections earlier

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Change log to fmt for a couple of messages

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Update hashgen

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Update binary name in Makefile

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>