Updated NetBeans Java source level to 11.

Core/nbproject/project.properties

@@ -113,7 +113,7 @@ file.reference.threetenbp-1.3.3.jar=release\\modules\\ext\\threetenbp-1.3.3.jar
 file.reference.webp-imageio-sejda-0.1.0.jar=release\\modules\\ext\\webp-imageio-sejda-0.1.0.jar
 file.reference.xmpcore-5.1.3.jar=release\\modules\\ext\\xmpcore-5.1.3.jar
 file.reference.zookeeper-3.4.6.jar=release\\modules\\ext\\zookeeper-3.4.6.jar
-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 license.file=../LICENSE-2.0.txt
 nbm.homepage=http://www.sleuthkit.org/

Experimental/nbproject/project.properties

@@ -3,7 +3,7 @@ file.reference.jackson-core-2.7.0.jar=release/modules/ext/jackson-core-2.7.0.jar
 file.reference.LGoodDatePicker-10.3.1.jar=release/modules/ext/LGoodDatePicker-10.3.1.jar
 file.reference.mchange-commons-java-0.2.9.jar=release/modules/ext/mchange-commons-java-0.2.9.jar
 file.reference.postgresql-9.4-1201-jdbc41.jar=release/modules/ext/postgresql-9.4-1201-jdbc41.jar
-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 javadoc.reference.LGoodDatePicker-10.3.1.jar=release/modules/ext/LGoodDatePicker-10.3.1-javadoc.jar
 source.reference.LGoodDatePicker-10.3.1.jar=release/modules/ext/LGoodDatePicker-10.3.1-sources.jar

ImageGallery/nbproject/project.properties

 file.reference.sqlite-jdbc-3.7.8-SNAPSHOT.jar=release/modules/ext/sqlite-jdbc-3.7.8-SNAPSHOT.jar
-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 license.file=LICENSE-2.0.txt
 nbm.homepage=http://www.sleuthkit.org/

KeywordSearch/nbproject/project.properties

@@ -19,7 +19,7 @@ file.reference.slf4j-api-1.7.6.jar=release\\modules\\ext\\slf4j-api-1.7.6.jar
 file.reference.solr-solrj-4.9.1.jar=release\\modules\\ext\\solr-solrj-4.9.1.jar
 file.reference.wstx-asl-3.2.7.jar=release\\modules\\ext\\wstx-asl-3.2.7.jar
 file.reference.zookeeper-3.4.6.jar=release\\modules\\ext\\zookeeper-3.4.6.jar
-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 license.file=../LICENSE-2.0.txt
 nbm.homepage=http://www.sleuthkit.org/autopsy/

RecentActivity/nbproject/project.properties

-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 license.file=../LICENSE-2.0.txt
 nbm.homepage=http://www.sleuthkit.org/autopsy/

Testing/nbproject/project.properties

-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 license.file=../LICENSE-2.0.txt
 nbm.homepage=http://www.sleuthkit.org/autopsy/

thunderbirdparser/nbproject/project.properties

@@ -9,7 +9,7 @@ file.reference.guava-19.0.jar=release/modules/ext/guava-19.0.jar
 file.reference.java-libpst-1.0-SNAPSHOT.jar=release/modules/ext/java-libpst-1.0-SNAPSHOT.jar
 file.reference.ez-vcard-0.10.5.jar=release/modules/ext/ez-vcard-0.10.5.jar
 file.reference.vinnie-2.0.2.jar=release/modules/ext/vinnie-2.0.2.jar
-javac.source=1.8
+javac.source=11
 javac.compilerargs=-Xlint -Xlint:-serial
 javadoc.reference.guava-19.0.jar=release/modules/ext/guava-19.0-javadoc.jar
 license.file=../LICENSE-2.0.txt