go.mod, workflows: make 1.22 minimal go version supported

This follows our new go version policy: nspcc-dev/.github#31.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

.github/workflows/tests.yml

@@ -16,19 +16,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-2022, macos-12, macos-14]
-        go: [ '1.21', '1.22', '1.23' ]
+        go: [ '1.22', '1.23' ]
         exclude:
           # Only latest Go version for Windows and MacOS.
-          - os: windows-2022
-            go: '1.21'
           - os: windows-2022
             go: '1.22'
-          - os: macos-12
-            go: '1.21'
           - os: macos-12
             go: '1.22'
-          - os: macos-14
-            go: '1.21'
           - os: macos-14
             go: '1.22'
           # Exclude latest Go version for Ubuntu as Coverage uses it.

go.mod

@@ -1,6 +1,6 @@
 module github.com/nspcc-dev/neofs-sdk-go
 
-go 1.21
+go 1.22
 
 require (
 	github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20221202181307-76fa05c21b12