add make deps

.travis.yml

@@ -1,7 +1,6 @@
 language: go
 
 go:
-  - "1.9.x"
   - "1.10.x"
   - "master"
 

Makefile

@@ -4,6 +4,9 @@ aul:
 run:
 	go run main.go
 
+deps:
+	GO111MODULE=on go mod vendor
+
 debug:
 	DEBUG=1 go run main.go
 

README.md

@@ -651,10 +651,16 @@ Frequently asked questions:
 
 Running cointop from source
 
-```
+```bash
 make run
 ```
 
+### Update vendor dependencies
+
+```bash
+make deps
+```
+
 ### Homebrew
 
 Installing from source