update bcel and findbugs->spotbugs (#52)

Author: vtrifonov

dts-generator/build.gradle

@@ -24,9 +24,9 @@ allprojects {
 }
 
 dependencies {
-    implementation 'org.apache.bcel:bcel:6.2'
+    implementation 'org.apache.bcel:bcel:6.4.1'
     implementation 'commons-io:commons-io:2.6'
-    implementation 'com.google.code.findbugs:findbugs:3.0.1'
+    implementation 'com.github.spotbugs:spotbugs:3.1.12'
 
     // add your dependency here as the example bellow, make sure you are using testCompileOnly
     // testCompileOnly  "com.android.support:support-v4:27.0.1"