Test 1.16beta1

Author: benbjohnson

.github/workflows/test.yml

@@ -6,7 +6,8 @@ jobs:
     steps:
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.15'
+          stable: false
+          go-version: '1.16beta1'
 
       - uses: actions/checkout@v2