replace deprecated dependency configurations

Using api and implementation instead of the
deprecated compile configuration.

Update to Gradle 6.0.

pdb-api/build.gradle

@@ -1,7 +1,7 @@
 
 dependencies {
-    compile project(':byte-utils')
-	compile project(':pdb-utils')
-	compile project(':file-utils')
-    compile lib_primitive_collections
+  implementation project(':byte-utils')
+	implementation project(':pdb-utils')
+	implementation project(':file-utils')
+  implementation lib_primitive_collections
 }