chore(deps): update dependency org.springframework.boot:spring-boot-starter-test to v2.7.18 (#208)

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

Author: renovate[bot]

spring/build.gradle.kts

@@ -1,7 +1,7 @@
 dependencies {
     api(project(":cache-core"))
     implementation("org.springframework:spring-context:5.3.31")
-    testImplementation("org.springframework.boot:spring-boot-starter-test:2.7.17")
+    testImplementation("org.springframework.boot:spring-boot-starter-test:2.7.18")
     testImplementation("org.awaitility:awaitility:4.2.0")
     testImplementation(testFixtures(project(":cache-core")))
     testImplementation(project(":cache-provider-caffeine"))