feat: upgrade Gradle and SBT plugins

Gradle: use gradle wrapper script if present
SBT: distinguish between single and multi build configurations

package.json

@@ -45,15 +45,15 @@
     "request": "^2.74.0",
     "semver": "^5.1.0",
     "snyk-config": "1.0.1",
-    "snyk-gradle-plugin": "1.0.2",
+    "snyk-gradle-plugin": "1.0.3",
     "snyk-module": "1.8.1",
     "snyk-mvn-plugin": "1.0.0",
     "snyk-policy": "1.7.1",
     "snyk-python-plugin": "1.2.2",
     "snyk-recursive-readdir": "^2.0.0",
     "snyk-resolve": "1.0.0",
     "snyk-resolve-deps": "1.7.0",
-    "snyk-sbt-plugin": "1.0.2",
+    "snyk-sbt-plugin": "1.1.0",
     "snyk-tree": "^1.0.0",
     "snyk-try-require": "^1.2.0",
     "tempfile": "^1.1.1",