Update to Gretty 4.1.2

Closes gh-859

Author: jzheaux

buildSrc/build.gradle

@@ -84,7 +84,9 @@ dependencies {
 
     implementation 'io.github.gradle-nexus:publish-plugin:1.1.0'
     implementation 'io.projectreactor:reactor-core:3.4.11'
-    implementation 'org.gretty:gretty:4.0.0'
+    implementation ('org.gretty:gretty:4.1.2') {
+        exclude group: 'org.springframework.boot', module: 'spring-boot-loader-tools'
+    }
     implementation 'com.apollographql.apollo:apollo-runtime:2.4.5'
     implementation 'com.github.ben-manes:gradle-versions-plugin:0.38.0'
     implementation 'com.github.spullara.mustache.java:compiler:0.9.4'
@@ -96,6 +98,7 @@ dependencies {
     implementation 'org.hidetake:gradle-ssh-plugin:2.10.1'
     implementation 'org.jfrog.buildinfo:build-info-extractor-gradle:4.26.1'
     implementation 'org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:2.7.1'
+    implementation 'org.springframework:spring-core:5.3.31'
 
     testImplementation platform('org.junit:junit-bom:5.8.1')
     testImplementation "org.junit.jupiter:junit-jupiter-api"