update ktlint and gradle versions for testing

add ktlint 0.48.2 to tested versions
update latest gradle to 7.6

Author: wakingrufus

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/GitHookTasksTest.kt

@@ -38,10 +38,10 @@ class GitHookTasksTest : AbstractPluginTest() {
             )
 
             buildAndFail(":some-module:$INSTALL_GIT_HOOK_CHECK_TASK") {
-                assertThat(output).contains("Task '$INSTALL_GIT_HOOK_CHECK_TASK' not found in project")
+                assertThat(output).containsIgnoringCase("Task '$INSTALL_GIT_HOOK_CHECK_TASK' not found in project")
             }
             buildAndFail(":some-module:$INSTALL_GIT_HOOK_FORMAT_TASK") {
-                assertThat(output).contains("Task '$INSTALL_GIT_HOOK_FORMAT_TASK' not found in project")
+                assertThat(output).containsIgnoringCase("Task '$INSTALL_GIT_HOOK_FORMAT_TASK' not found in project")
             }
         }
     }

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/KtLintSupportedVersionsTest.kt

@@ -117,7 +117,8 @@ class KtLintSupportedVersionsTest : AbstractPluginTest() {
             "0.46.1",
             "0.47.1",
             "0.48.0",
-            "0.48.1"
+            "0.48.1",
+            "0.48.2"
         ).also {
             // "0.37.0" is failing on Windows machines that is fixed in the next version
             if (!OS.WINDOWS.isCurrentOs) it.add("0.37.0")

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/testdsl/testAnnotations.kt

@@ -12,7 +12,7 @@ import kotlin.streams.asStream
 
 object TestVersions {
     const val minSupportedGradleVersion = KtlintBasePlugin.LOWEST_SUPPORTED_GRADLE_VERSION
-    const val maxSupportedGradleVersion = "7.1.1"
+    const val maxSupportedGradleVersion = "7.6"
     val pluginVersion = File("VERSION_CURRENT.txt").readText().trim()
     const val minSupportedKotlinPluginVersion = "1.4.32"
     const val maxSupportedKotlinPluginVersion = "1.5.31"