Update test matrix

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
       image: darthsim/imgproxy-ci:latest
     strategy:
       matrix:
-        go-version: ["1.18.x"]
+        go-version: ["1.19.x"]
         vips-version: ["8.12"]
     steps:
       - name: Checkout

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
       image: darthsim/imgproxy-ci:latest
     strategy:
       matrix:
-        go-version: ["1.18.x", "1.17.x", "1.16.x"]
+        go-version: ["1.19.x", "1.18.x"]
         vips-version: ["8.12", "8.11", "8.10"]
     steps:
       - name: Checkout