! upgrade dependencies/plugins

Merge pull request #263 #264 #269 #271

Bumps [jacoco-maven-plugin](https://github.com/jacoco/jacoco) from 0.8.6 to 0.8.7.
- [Release notes](https://github.com/jacoco/jacoco/releases)
- [Commits](https://github.com/jacoco/jacoco/compare/v0.8.6...v0.8.7)

Bumps [maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 1.6 to 3.0.1.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)

Bumps [spotbugs-maven-plugin](https://github.com/spotbugs/spotbugs-maven-plugin) from 4.2.2 to 4.2.3.
- [Release notes](https://github.com/spotbugs/spotbugs-maven-plugin/releases)
- [Commits](https://github.com/spotbugs/spotbugs-maven-plugin/compare/4.2.2...spotbugs-maven-plugin-4.2.3)

Bumps [spotbugs-annotations](https://github.com/spotbugs/spotbugs) from 4.2.2 to 4.2.3.
- [Release notes](https://github.com/spotbugs/spotbugs/releases)
- [Changelog](https://github.com/spotbugs/spotbugs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spotbugs/spotbugs/compare/4.2.2...4.2.3)

pom.xml

@@ -126,7 +126,7 @@
 			<groupId>com.github.spotbugs</groupId>
 			<artifactId>spotbugs-annotations</artifactId>
 			<scope>provided</scope>
-			<version>4.2.2</version>
+			<version>4.2.3</version>
 		</dependency>
 		<!--
 			make other qa libs
@@ -339,7 +339,7 @@
 			<plugin>
 				<groupId>com.github.spotbugs</groupId>
 				<artifactId>spotbugs-maven-plugin</artifactId>
-				<version>4.2.2</version>
+				<version>4.2.3</version>
 			</plugin>
 			<!--
 				official docs: https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html
@@ -548,7 +548,7 @@
 				<plugins>
 					<plugin>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>1.6</version>
+						<version>3.0.1</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>
@@ -656,7 +656,7 @@
 						<!-- plugin docs: http://eclemma.org/jacoco/trunk/doc/ -->
 						<groupId>org.jacoco</groupId>
 						<artifactId>jacoco-maven-plugin</artifactId>
-						<version>0.8.6</version>
+						<version>0.8.7</version>
 						<executions>
 							<execution>
 								<goals>

pom4ide.xml

@@ -126,7 +126,7 @@
 			<groupId>com.github.spotbugs</groupId>
 			<artifactId>spotbugs-annotations</artifactId>
 			<scope>provided</scope>
-			<version>4.2.2</version>
+			<version>4.2.3</version>
 		</dependency>
 		<!--
 			make other qa libs
@@ -339,7 +339,7 @@
 			<plugin>
 				<groupId>com.github.spotbugs</groupId>
 				<artifactId>spotbugs-maven-plugin</artifactId>
-				<version>4.2.2</version>
+				<version>4.2.3</version>
 			</plugin>
 			<!--
 				official docs: https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html
@@ -548,7 +548,7 @@
 				<plugins>
 					<plugin>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>1.6</version>
+						<version>3.0.1</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>
@@ -656,7 +656,7 @@
 						<!-- plugin docs: http://eclemma.org/jacoco/trunk/doc/ -->
 						<groupId>org.jacoco</groupId>
 						<artifactId>jacoco-maven-plugin</artifactId>
-						<version>0.8.6</version>
+						<version>0.8.7</version>
 						<executions>
 							<execution>
 								<goals>