go.mod: update to go 1.18

This allows to e.g. use strings.Cut and drop io/ioutil usage.
tklauser · Dec 1, 2023 · 73ea1b3 · 73ea1b3
1 parent c234513
commit 73ea1b3
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diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -12,7 +12,8 @@ jobs:
   build-and-test:
     strategy:
       matrix:
-        go-version: ['1.19', '1.20', '1.21']
+        # Oldest supported version is 1.18, plus the latest two releases.
+        go-version: ['1.18', '1.20', '1.21']
         os: [ubuntu-20.04, ubuntu-22.04, macos-11, macos-12, macos-13]
     runs-on: ${{ matrix.os }}
 

diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/tklauser/go-sysconf
 
-go 1.13
+go 1.18
 
 require (
 	github.com/tklauser/numcpus v0.6.1