chore: Upgrade java version (#3)

Author: Distractic

.github/workflows/check-branch.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Initialization
         uses: ./.github/actions/init
         with:
-          jdk: 8
+          jdk: 17
 
       - name: Build
         uses: gradle/gradle-build-action@v2.7.0

.github/workflows/sonar.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Initialization
         uses: ./.github/actions/init
         with:
-          jdk: 8
+          jdk: 17
 
       - name: Build
         uses: gradle/gradle-build-action@v2.7.0

build.gradle.kts

@@ -10,9 +10,9 @@ plugins {
     jacoco
 }
 
-val javaVersion get() = JavaVersion.VERSION_1_8
+val javaVersion get() = JavaVersion.VERSION_17
 val javaVersionString get() = javaVersion.toString()
-val javaVersionInt get() = 8
+val javaVersionInt get() = javaVersionString.toInt()
 
 detekt {
     // Allows having different behavior for CI.