build(deps): set go.mod to 1.24 and retract v2.1.4 (#37)

This PR sets Go mod version for the package to 1.24 and retracts package v2.1.4 which set an unnecessarily high requirement for Go to be 1.25.1.

Author: pkazmierczak

.github/workflows/test.yaml

@@ -49,7 +49,7 @@ jobs:
       - run: go test -v ./codec
       - run: go test -tags codecgen.exec -v ./codec
       - name: Generate coverage report
-        run: go env -w GOTOOLCHAIN=go1.25.1+auto && go test -v -coverprofile=coverage.out ./...
+        run: go test -v -coverprofile=coverage.out ./...
       - name: Upload coverage report
         uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808
         with:

.go-version

@@ -1 +1 @@
-1.25.1
+1.24.7

go.mod

@@ -1,6 +1,10 @@
 module github.com/hashicorp/go-msgpack/v2
 
-go 1.25.1
+go 1.24.0
+
+toolchain go1.24.7
+
+retract v2.1.4 // Contains unnecessarily high go 1.25.1 build requirement
 
 require (
 	github.com/Sereal/Sereal/Go/sereal v0.0.0-20231009093132-b9187f1a92c6