Update go version to 1.20 (#165)

cristinaleonr · web-flow · commit 8840b6926cfb · 2023-08-28T14:22:21.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: go
 go:
-- 1.18
+- 1.20
 
 before_install:
 - go install github.com/mattn/goveralls@latest
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the traceroute-caller binary.
-FROM golang:1.18 as build_caller
+FROM golang:1.20 as build_caller
 ADD . /go/src/github.com/m-lab/traceroute-caller
 RUN rm /go/src/github.com/m-lab/traceroute-caller/Dockerfile
 ENV CGO_ENABLED 0
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/m-lab/traceroute-caller
 
-go 1.18
+go 1.20
 
 require (
 	github.com/go-test/deep v1.0.7
