chore: add support to Go 1.18

Author: Sergio VS

.github/workflows/build.yml

@@ -4,7 +4,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [1.15.x, 1.16.x, 1.17.x]
+        go-version: [1.15.x, 1.16.x, 1.17.x, 1.18.x]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

.github/workflows/test.yml

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