Updating main.yml with some extra versions to check

Adding some versions to check compilation on for any version
checks/flags we have setup in the code.

4.19 - For a check in 4.5/wacom_sys.c in wacom_map_usage for
the compare_device_paths method.

4.2 - For a method in 3.17/wacom_sys.c hid_field_extract.

.github/workflows/main.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        kernel: ["6.3", "5.10", "4.14", "4.10", "4.6", "4.5", "4.1", "3.19", "3.18", "3.17"]
+        kernel: ["6.3", "5.10", "4.19", "4.14", "4.10", "4.6", "4.5", "4.2", "4.1", "3.19", "3.18", "3.17"]
         include:
           - kernel: "3.17"
             compile_cflags: -fno-pie -Wno-error=format-truncation
@@ -23,6 +23,9 @@ jobs:
           - kernel: "4.1"
             compile_cflags: -fno-pie -Wno-error=format-truncation
             prepare_cflags: -fno-pie -no-pie
+          - kernel: "4.2"
+            compile_cflags: -fno-pie -Wno-error=format-truncation
+            prepare_cflags: -fno-pie -no-pie
           - kernel: "4.5"
             compile_cflags: -fno-pie -Wno-error=format-truncation -Wno-error=pointer-sign
             prepare_cflags: -fno-pie -no-pie
@@ -34,6 +37,8 @@ jobs:
             prepare_cflags: -fno-pie -no-pie
           - kernel: "4.14"
             compile_cflags: -Wno-error=format-truncation -Wno-error=pointer-sign
+          - kernel: "4.19"
+            compile_cflags: -Wno-error=format-truncation -Wno-error=pointer-sign
           - kernel: "5.10"
             compile_cflags: -Wno-error=format-truncation -Wno-error=pointer-sign
           - kernel: "6.3"