fix(manager/sbt): Support for updating Scala 3

lib/modules/manager/sbt/__snapshots__/extract.spec.ts.snap

@@ -104,6 +104,24 @@ exports[`modules/manager/sbt/extract extractPackageFile() extract deps from nati
 }
 `;
 
+exports[`modules/manager/sbt/extract extractPackageFile() extracts correct scala library when dealing with scala 3 1`] = `
+{
+  "deps": [
+    {
+      "currentValue": "3.1.1",
+      "datasource": "maven",
+      "depName": "scala",
+      "packageName": "org.scala-lang:scala3-library_3",
+      "registryUrls": [
+        "https://repo.maven.apache.org/maven2",
+      ],
+      "separateMinorPatch": true,
+    },
+  ],
+  "packageFileVersion": undefined,
+}
+`;
+
 exports[`modules/manager/sbt/extract extractPackageFile() extracts deps for generic use-cases 1`] = `
 {
   "deps": [

lib/modules/manager/sbt/extract.spec.ts

@@ -223,6 +223,21 @@ describe('modules/manager/sbt/extract', () => {
       });
     });
 
+    it('extracts correct scala library when dealing with scala 3', () => {
+      const content = `
+        scalaVersion := "3.1.1"
+      `;
+
+      expect(extractPackageFile(content)).toMatchSnapshot({
+        deps: [
+          {
+            packageName: 'org.scala-lang:scala3-library_3',
+            currentValue: '3.1.1',
+          },
+        ],
+      });
+    });
+
     it('extracts deps when scala version is defined in a variable with ThisBuild scope', () => {
       const content = `
         val ScalaVersion = "2.12.10"

lib/modules/manager/sbt/extract.ts

@@ -8,6 +8,8 @@ import {
   SBT_PLUGINS_REPO,
   SbtPluginDatasource,
 } from '../../datasource/sbt-plugin';
+import { get } from '../../versioning';
+import * as mavenVersioning from '../../versioning/maven';
 import { REGISTRY_URLS } from '../gradle/parser/common';
 import type { PackageDependency, PackageFile } from '../types';
 import { normalizeScalaVersion } from './util';
@@ -49,10 +51,17 @@ const scalaVersionMatch = q
   )
   .handler((ctx) => {
     if (ctx.scalaVersion) {
+      const version = get(mavenVersioning.id);
+
+      let packageName = 'org.scala-lang:scala-library';
+      if (version.getMajor(ctx.scalaVersion) === 3) {
+        packageName = 'org.scala-lang:scala3-library_3';
+      }
+
       const dep: PackageDependency = {
         datasource: MavenDatasource.id,
         depName: 'scala',
-        packageName: 'org.scala-lang:scala-library',
+        packageName,
         currentValue: ctx.scalaVersion,
         separateMinorPatch: true,
       };