update github actions for newer go versions

Author: nathanejohnson

.github/workflows/build.yml

@@ -4,7 +4,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [ 1.16.x, 1.15.x ]
+        go-version: [ 1.18.x, 1.17.x ]
         os: [ ubuntu-latest ]
     runs-on: ${{matrix.os}}
     steps: