Replace sha1sum with jack's gosum and get rid of
vendor-deps.
Also don't compute hash on vendor/ contents.
Instead hash go.sum.
Disable unconvert lint check. It does not
work very well with go mod.
Remove update_vendor_deps once and for all.
Upgrade to go 1.12
Closes: #3919#3630
* Added dependencies block anchor to simplify
* Increased blocks to 1000 and removed cache restore
* Made the period a parameter in the script
* Renamed the jobs because git is confused
* Specify period on long sim
* Update PENDING.md
* Add simple period for expensive invariants
* Remove individual module simulations
* Simulate a few more blocks
* Add README explaining reason for shell scripts
* Deduplicate scripts, log exact replication command on failure
* Refactor invariants to take sdk.Context instead of baseapp.BaseApp
* Reference all issues in PENDING.md entry
* Remove no longer used simulation.RandSetup
* Bug fixes
* Address @rigelrozanski comments
* Fix typo