Run tests for Go 1.20 version (#322)

Author: Bakhtiyar-Garashov

.github/workflows/test.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.13.x, 1.14.x, 1.15.x, 1.16.x, 1.17.x, 1.18.x, 1.19.x]
+        go-version: [1.13.x, 1.14.x, 1.15.x, 1.16.x, 1.17.x, 1.18.x, 1.19.x, 1.20.x]
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
@@ -17,5 +17,5 @@ jobs:
     - name: Test
       run: go test -v -race ./...
     - name: Format
-      if: matrix.go-version == '1.19.x'
+      if: matrix.go-version == '1.20.x'
       run: diff -u <(echo -n) <(gofmt -d .)