Bump io.asyncer:r2dbc-mysql from 1.0.3 to 1.0.4 in /modules/mysql

Bumps [io.asyncer:r2dbc-mysql](https://github.com/asyncer-io/r2dbc-mysql) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/asyncer-io/r2dbc-mysql/releases)
- [Commits](asyncer-io/r2dbc-mysql@r2dbc-mysql-1.0.3...r2dbc-mysql-1.0.4)

---
updated-dependencies:
- dependency-name: io.asyncer:r2dbc-mysql
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

modules/mysql/build.gradle

@@ -7,13 +7,13 @@ dependencies {
     api project(':jdbc')
 
     compileOnly project(':r2dbc')
-    compileOnly 'io.asyncer:r2dbc-mysql:1.0.3'
+    compileOnly 'io.asyncer:r2dbc-mysql:1.0.4'
 
     testImplementation project(':jdbc-test')
     testRuntimeOnly 'mysql:mysql-connector-java:8.0.33'
 
     testImplementation testFixtures(project(':r2dbc'))
-    testRuntimeOnly 'io.asyncer:r2dbc-mysql:1.0.3'
+    testRuntimeOnly 'io.asyncer:r2dbc-mysql:1.0.4'
 
     compileOnly 'org.jetbrains:annotations:24.0.1'
 }