go.mod: Set 'go' to 1.18 (#361)

Set the go directive in go.mod to 1.18. This will allow use of features introduced in Go 1.18. Go 1.19 was released some time ago, and 1.20 is around the corner, so there's no reason to support 1.17.
uber-go · Nov 2, 2022 · 9324516 · 9324516
1 parent e998f7e
commit 9324516
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diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ["1.17.x", "1.18.x", "1.19.x"]
+        go: ["1.18.x", "1.19.x"]
         include:
         - go: 1.19.x
           latest: true

diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module go.uber.org/dig
 
-go 1.17
+go 1.18
 
 require github.com/stretchr/testify v1.7.1