* update gogo/protobuf version from v1.2.1 to v1.3.0

Also errcheck from v1.1.0 to v1.2.0

See full diff in
- https://github.com/gogo/protobuf/compare/v1.2.1...v1.3.0
- https://github.com/kisielk/errcheck/compare/v1.1.0...v1.2.0

Changelog:

Tested versions:

go 1.12.9
protoc 3.7.1
Improvements:

    plugin/stringer - Handle repeated and/or nullable types a bit better now.
    plugin/size - Remove the loop in sovXXX by using bit twiddling.
        Thanks: https://github.com/apelisse
    plugin/marshalto - Implemented a reverse marshal strategy which allows for faster marshalling. This now avoids a recursive (and repeated) call to Size().
        Thanks: https://github.com/apelisse
    plugin/compare - Added support for for oneof types.

Bug fixes:

    protoc-gen-gogo/generator - Fix assignment to entry in nil map.
        Thanks: https://github.com/tgulacsi
    protoc-gen-gogo/generator - Allows plugins to call RecordTypeUse without panicking.
        Thanks: https://github.com/fedenusy
    proto/extensions - Fixed set extension regression. We did not clear the extensions before setting.
    io/uint32 - fix uint32reader bug that causes ReadMsg to recreate buffer when lengths are the same.
        Thanks: https://github.com/SebiSujar
    proto/table_merge: Fix merge of non-nullable slices.
        Thanks: https://github.com/euroelessar

Upstream commits:

    merged in golang/protobuf commit 318d17de72 - Add UnimplementedServer for server interface
    merged in golang/protobuf commit b85cd75de7 - protoc-gen-go/grpc: inline errUnimplemented function
    merged in golang/protobuf commit d3c38a4eb4 - protoc-gen-go/grpc: use status and code packages only if needed
    merged in golang/protobuf commit e91709a02e - fix indentation in jsonpb with Any messages
    merged in golang/protobuf commit 8d0c54c124 - protoc-gen-go: generate XXX_OneofWrappers instead of XXX_OneofFuncs

Misc:

    extensions.md - Markdown update.
        Thanks: https://github.com/TennyZhuang
    Readme.md - Added user.
    go/protoc update - Updated to go1.12.x and protoc 3.7.1
    Makefile update - fix go vet shadow tool reference
    test/mixbench - Update mixbench tool. Expose runnable benchmarks via flags.

* update certstrap

* update golangci-lint from v1.13.2 to v1.17.1

* update gox as well

* test

* comment out golangci temporary

* comment out go-deadlock deps

* manually swagging

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* three definitions with polymorphism

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* added blockchain and block

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* low quality generation, commit, block_response and validators

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* genesis and consensus states endpoints

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* fix indentation

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* consensus parameters

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* fix indentation

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* add height to consensus parameters endpoint

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* unconfirmed_txs and num_unconfirmed_txs

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* add missing query parameter

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* add ABCI queries

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* added index document for swagger documentation

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* add missing routes

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* contract tests added on CCI

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* contract tests job should be in the test suite

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* simplify requirements to test

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* typo

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* build is a prerequisite to start localnet

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* reduce nodejs size, move goodman to get_tools, add docs, fix comments

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* Update scripts/get_tools.sh

That's cleaner, thanks!

Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>

* xz not supported by cci image, let's keep it simple

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* REMOVE-indirect debug of CCI paths

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* dirty experiment, volume is empty but binary has been produced

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* dirty experiment, volume is empty but binary has been produced

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* dirty experiment going on

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* locally works, CCI have difficulties with second layaer containers volumes

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* restore experiment, use machine instead of docker for contract tests

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* simplify a bit

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* rollback on machine golang

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* Document the changes

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* Changelog

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* comments

Signed-off-by: Karoly Albert Szabo <szabo.karoly.a@gmail.com>

* Update to using go mod from dep

* Remove references to make get_vendor_deps

* Specify go version

* Set GO111MODULE=on and add -mod=readonly

* Fix exported env

* switch to using go1.12 everywhere

* Fix test scripts

* Typo:

* Prepend GO111MODULE=on

* remove dep cache

* Revert "remove dep cache"

This reverts commit 45117bda

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* bring back the dependency cache and change it to cache modules instead
of vendored deps; also:

 - bump version for dependency cache
 - bump version on pkg-cache (includes modules directory)

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* remove some more traces of dep:
 - remove Gopkg.(toml | lock)
 - update contributing guidlines
 - set global default in circleci (GO111MODULE=on)

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* global var failed for `test_cover` with
`go: unknown environment setting GO111MODULE=true`
although the var was `GO111MODULE: on`

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* Changelog pending entry

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* Add bbolt dependency to go.mod

Signed-off-by: Ismail Khoffi <Ismail.Khoffi@gmail.com>

* move -mod=readonly to build flags

in the attempt to fix https://circleci.com/gh/tendermint/tendermint/43165

also

    code is simplified by running gofmt -s .
    remove unused vars
    enable linters we're currently passing
    remove deprecated linters

* add go-deadlock tool to help detect deadlocks

Run it with `make test_with_deadlock`. After it's done, use Git to
cleanup `git checkout .`

Link: https://github.com/sasha-s/go-deadlock/
Replaces https://github.com/tendermint/tendermint/pull/3148

* add a target to cleanup changes