logic: extend language support to Java 12 (issue #752) (#844)

* update java indexer dependencies
* update java language support to java 12
* enable java preview features by default
* add test for Java 12 support

src/test/JavaIndexSampleProjectsTestSuite.cpp

@@ -21,7 +21,7 @@
 #	include "utilityPathDetection.h"
 #	include "utilityString.h"
 
-#	define REQUIRE_MESSAGE(msg, cond)                                                             \
+#	define REQUIRE_MESSAGE(msg, cond)                                                              \
 		do                                                                                         \
 		{                                                                                          \
 			INFO(msg);                                                                             \
@@ -70,7 +70,7 @@ std::shared_ptr<TextAccess> parseCode(
 	JavaParser parser(
 		std::make_shared<ParserClientImpl>(&storage), std::make_shared<IndexerStateInfo>());
 	std::shared_ptr<IndexerCommandJava> command = std::make_shared<IndexerCommandJava>(
-		sourceFilePath, L"8", classpath);
+		sourceFilePath, L"12", classpath);
 
 	TimeStamp startTime = TimeStamp::now();
 	parser.buildIndex(command);