multi: bump Golang version to v1.20.3

guggero · guggero · commit 298a2789527a · 2023-04-11T16:37:38.000+02:00
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -16,7 +16,7 @@ env:
   # go needs absolute directories, using the $HOME variable doesn't work here.
   GOCACHE: /home/runner/work/go/pkg/build
   GOPATH: /home/runner/work/go
-  GO_VERSION: 1.18.4
+  GO_VERSION: 1.20.3
 
 jobs:
   ########################
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/guggero/chantools
 
-go 1.18
+go 1.19
 
 require (
 	github.com/btcsuite/btcd v0.23.5-0.20230125025938-be056b0a0b2f
