Bump pl.allegro.tech.boot:handlebars-spring-boot-starter

Bumps [pl.allegro.tech.boot:handlebars-spring-boot-starter](https://github.com/allegro/handlebars-spring-boot-starter) from 0.3.4 to 0.4.0.
- [Release notes](https://github.com/allegro/handlebars-spring-boot-starter/releases)
- [Commits](allegro/handlebars-spring-boot-starter@handlebars-spring-boot-starter-0.3.4...handlebars-spring-boot-starter-0.4.0)

---
updated-dependencies:
- dependency-name: pl.allegro.tech.boot:handlebars-spring-boot-starter
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -22,7 +22,7 @@ sourceCompatibility = 1.8
 
 dependencies {
     compile 'org.springframework.boot:spring-boot-starter-web'
-    compile 'pl.allegro.tech.boot:handlebars-spring-boot-starter:0.3.4'
+    compile 'pl.allegro.tech.boot:handlebars-spring-boot-starter:0.4.0'
 
     testCompile 'org.springframework.boot:spring-boot-starter-test'
 }