Update dependency com.emergetools.android to v4.2.1 (#393)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| com.emergetools.android | `4.2.0` -> `4.2.1` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/com.emergetools.android:com.emergetools.android.gradle.plugin/4.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.emergetools.android:com.emergetools.android.gradle.plugin/4.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.emergetools.android:com.emergetools.android.gradle.plugin/4.2.0/4.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.emergetools.android:com.emergetools.android.gradle.plugin/4.2.0/4.2.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/EmergeTools/hackernews).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xODUuNCIsInVwZGF0ZWRJblZlciI6IjM5LjE4NS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

android/gradle/libs.versions.toml

@@ -16,7 +16,7 @@ kotlinx-serialization-json = "1.8.0"
 viewmodel = "2.8.7"
 navigation = "2.8.8"
 browser = "1.8.0"
-emergePlugin = "4.2.0"
+emergePlugin = "4.2.1"
 emergeSnapshots = "1.3.3"
 emergeReaper = "1.0.1-SNAPSHOT"
 emergeDistribution = "0.0.5-SNAPSHOT"