Update test compiler

Author: fiorix

.travis.yml

@@ -1,9 +1,6 @@
 language: go
 go:
-        - "1.7"
-        - "1.8"
-        - "1.9"
-        - "1.10"
+        - "1.15"
         - "tip"
 install:
         - go get -d -v ./...

go.mod

@@ -1,8 +1,9 @@
-module github.com/fiorix/go-smpp
+module github.com/fiorix/go-smpp/v2
 
-go 1.16
+go 1.15
 
 require (
+	github.com/fiorix/go-smpp v0.0.0-20210403173735-2894b96e70ba
 	github.com/urfave/cli v1.22.5
 	golang.org/x/text v0.3.6
 	golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba

go.sum

@@ -1,7 +1,8 @@
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/fiorix/go-smpp v0.0.0-20210403173735-2894b96e70ba h1:vBqABUa2HUSc6tj22Tw+ZMVGHuBzKtljM38kbRanmrM=
+github.com/fiorix/go-smpp v0.0.0-20210403173735-2894b96e70ba/go.mod h1:VfKFK7fGeCP81xEhbrOqUEh45n73Yy6jaPWwTVbxprI=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=