Fix database migrations

app/src/androidTest/java/org/koitharu/kotatsu/core/db/MangaDatabaseTest.kt

@@ -17,7 +17,7 @@ class MangaDatabaseTest {
 		MangaDatabase::class.java,
 	)
 
-	private val migrations = getDatabaseMigrations()
+	private val migrations = getDatabaseMigrations(InstrumentationRegistry.getInstrumentation().targetContext)
 
 	@Test
 	fun versions() {

app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration13To14.kt

@@ -9,5 +9,7 @@ class Migration13To14 : Migration(13, 14) {
 		database.execSQL("ALTER TABLE favourite_categories ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
 		database.execSQL("ALTER TABLE favourites ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
 		database.execSQL("ALTER TABLE history ADD COLUMN `deleted_at` INTEGER NOT NULL DEFAULT 0")
+		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_brightness` REAL NOT NULL DEFAULT 0")
+		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_contrast` REAL NOT NULL DEFAULT 0")
 	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/core/db/migrations/Migration14To15.kt

@@ -5,8 +5,5 @@ import androidx.sqlite.db.SupportSQLiteDatabase
 
 class Migration14To15 : Migration(14, 15) {
 
-	override fun migrate(database: SupportSQLiteDatabase) {
-		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_brightness` REAL NOT NULL DEFAULT 0")
-		database.execSQL("ALTER TABLE preferences ADD COLUMN `cf_contrast` REAL NOT NULL DEFAULT 0")
-	}
+	override fun migrate(database: SupportSQLiteDatabase) = Unit
 }