POM: update parent to pom-scijava 39.0.0

Notable changes:
* Update ImgLib2 to from v6 to v7.
* Update Groovy from v3 to v4.
* Update Jython from v2.7.2 to v2.7.4.
* OpenAI GPT support for Script Editor.

Changed components:
* rsyntaxtextarea: 3.3.3 -> 3.5.1
* flatlaf: 3.1.1 -> 3.5.1
* jffi: 1.3.11 -> 1.3.13
* jnr-ffi: 2.2.13 -> 2.2.16
* jnr-netdb: 1.1.6 -> 1.2.0
* jnr-posix: 3.1.16 -> 3.1.19
* error_prone_annotations: 2.19.0 -> 2.32.0
* failureaccess: 1.0.1 -> 1.0.2
* guava: 31.1-jre -> 33.3.1-jre
* j2objc-annotations: 2.8 -> 3.0.0
* protobuf-java: 3.23.0 -> 4.28.2
* icu4j: 59.1 -> 75.1
* commons-codec: 1.15 -> 1.17.1
* commons-io: 2.11.0 -> 2.17.0
* commons-logging: 1.2 -> 1.3.4
* okhttp: 4.11.0 -> 4.12.0
* okio: 3.3.0 -> 3.9.1
* okio-jvm: 3.3.0 -> 3.9.1
* netty: 4.1.45.Final -> 4.1.73.Final
* scifio: 0.45.0 -> 0.46.0
* jitk-tps: 3.0.3 -> 3.0.4
* joda-time: 2.12.5 -> 2.13.0
* ij: 1.54f -> 1.54g
* imagej-common: 2.0.4 -> 2.1.1
* imagej-legacy: 1.2.1 -> 1.2.2
* imagej-mesh: 0.8.1 -> 0.8.2
* imagej-ops: 2.0.0 -> 2.2.0
* imagej-plugins-commands: 0.8.1 -> 0.8.2
* imglib2-algorithm: 0.14.0 -> 0.16.0
* imglib2-cache: 1.0.0-beta-17 -> 1.0.0-beta-19
* imglib2-ij: 2.0.1 -> 2.0.3
* imglib2: 6.2.0 -> 7.1.2
* imglib2-realtransform: 4.0.1 -> 4.0.3
* imglib2-roi: 0.14.1 -> 0.15.1
* jna: 5.13.0 -> 5.14.0
* ant: 1.10.13 -> 1.10.15
* ant-launcher: 1.10.13 -> 1.10.15
* commons-compress: 1.23.0 -> 1.27.1
* commons-lang3: 3.12.0 -> 3.17.0
* commons-text: 1.10.0 -> 1.12.0
* bsh: 2.1.0 -> 2.1.1
* ivy: 2.5.1 -> 2.5.2
* jackrabbit-webdav: 2.21.16 -> 2.21.22
* checker-qual: 3.34.0 -> 3.48.0
* plexus-utils: 3.5.1 -> 4.0.2
* javassist: 3.29.2-GA -> 3.30.2-GA
* kotlin: 1.8.22 -> 1.9.22
* jfreechart: 1.5.4 -> 1.5.5
* jline: 3.23.0 -> 3.27.0
* joml: 1.10.5 -> 1.10.8
* joni: 2.1.48 -> 2.2.1
* asm: 9.5 -> 9.7
* jython-slim: 2.7.2 -> 2.7.4
* scala-library: 2.13.10 -> 2.12.8
* scijava-common: 2.97.0 -> 2.99.0
* scijava-io-http: 0.2.1 -> 0.3.0
* scijava-plugins-commands: 0.2.4 -> 0.2.5
* ejml: 0.25 -> 0.41
* scijava-search: 2.0.4 -> 2.0.5
* scijava-ui-swing: 1.0.1 -> 1.0.3
* script-editor: 1.0.0 -> 1.1.0
* script-editor-jython: 1.0.0 -> 1.1.0
* scripting-beanshell: 0.4.1 -> 1.0.0
* scripting-groovy: 0.4.2 -> 1.0.0
* groovy: 3.0.4 -> 4.0.23
* bouncycastle: 1.62 -> 1.78.1

New components:
* jackson: 2.18.0
* adapter-rxjava2: 2.9.0
* converter-jackson: 2.9.0
* retrofit: 2.9.0
* openai-gpt3-java: 0.14.0
* classgraph: 4.8.21
* rxjava: 2.0.0
* validation-api: 2.0.1.Final
* reactive-streams: 1.0.3

pom.xml

@@ -5,13 +5,13 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>37.0.0</version>
+		<version>39.0.0</version>
 		<relativePath />
 	</parent>
 
 	<groupId>net.imagej</groupId>
 	<artifactId>imagej</artifactId>
-	<version>2.15.1-SNAPSHOT</version>
+	<version>2.16.0-SNAPSHOT</version>
 
 	<name>ImageJ2</name>
 	<description>ImageJ2 is a rewrite of ImageJ for multidimensional image data, with a focus on scientific imaging.</description>