use the latest golang 1.21 (#28)

Author: SashaZezulinsky

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Setup
         uses: actions/setup-go@v1
         with:
-          go-version: 1.17.x
+          go-version: 1.21
       - name: Test
         run: go test -v
   release:

go.mod

@@ -1,6 +1,6 @@
 module github.com/core-coin/go-randomy
 
-go 1.16
+go 1.21
 
 require (
 	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897