migrated from dep to Go modules

 - remove dep artifacts
 - remove traces of dep from make file: go build will handle those for us
 - update circelci config to go1.12

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/golang:1.10.3
+      - image: circleci/golang:1.12.0
         environment:
           GOBIN: /tmp/workspace/bin
 
@@ -21,7 +21,7 @@ jobs:
                 export PATH="$GOBIN:$PATH"
                 go env
                 go version
-                make get_tools && make get_vendor_deps && make test
+                make get_tools && make && make test
       - save_cache:
           key: v1-dep-{{ .Branch }}
           paths:

Makefile

@@ -1,9 +1,8 @@
 GOTOOLS = \
-	github.com/golang/dep/cmd/dep  \
 	gopkg.in/alecthomas/gometalinter.v2
-GOTOOLS_CHECK = dep gometalinter.v2
+GOTOOLS_CHECK = gometalinter.v2
 
-all: check_tools get_vendor_deps test metalinter
+all: check_tools test metalinter
 
 ########################################
 ###  Build
@@ -32,11 +31,6 @@ update_tools:
 	@echo "--> Updating tools"
 	@go get -u $(GOTOOLS)
 
-get_vendor_deps:
-	@rm -rf vendor/
-	@echo "--> Running dep ensure"
-	@dep ensure
-
 
 ########################################
 ### Testing
@@ -108,4 +102,4 @@ test_golang1.10rc:
 # To avoid unintended conflicts with file names, always add to .PHONY
 # unless there is a reason not to.
 # https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
-.PHONY: build install check_tools get_tools update_tools get_vendor_deps test fmt metalinter metalinter_all
+.PHONY: build install check_tools get_tools update_tools test fmt metalinter metalinter_all

go.mod

@@ -0,0 +1,12 @@
+module github.com/tendermint/go-amino
+
+go 1.12
+
+require (
+	github.com/davecgh/go-spew v1.1.0
+	github.com/golang/protobuf v1.1.0
+	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.2.2
+	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 // indirect
+)