* Update sdk version, implement pending txs, fix nonce check
* Bump cached dependencies in circleCI
* bump circleci go version
* updated linter and fixed bugs relating to go version 1.13
- Adds ethermint query command (`emintcli query ethermint <query>`)
- Supports block number, storage, code, balance lookups
- Implements RPC API methods `eth_blockNumber`, `eth_getStorageAt`, `eth_getBalance`, and `eth_getCode`
- Adds tester utility for RPC calls
- Adheres to go test format, but should not be run with regular suite
- Requires daemon and RPC server to be running
- Excluded from `make test`, available with `make test-rpc`
- Implemented AppModule interface and added EVM module to app
- Required for routing
- Implements `InitGenesis` (`x/evm/genesis.go`) and stubs `ExportGenesis`
- Modifies GenesisAccount to match expected format
* Fixed circleci config and fixed linting warnings
* Updated circleCI for go version 1.12 and split jobs for build/testing
* updated go version to 1.12.5 for circleCI
* Go mod tidy dependencies
* Updated linting tools and cleared up code lint smells
* Added workflow to run build and test jobs
* Moved linting command to build workflow
* Get dependencies before linting by default
* Added go module flag to linter and increased deadline to pull packages
* switched go package management from dep to go modules
* Removed dep references in makefile
* Added explicit go modules flag and go mod verify to makefile
