The cause: javac 10 and 11 are broken

In 10 and 11, the presence of a --release 9 (for either), or
--release 10 (for 11), will cause getDeclaredType to think it
is seeing java.sql types in *all of the modules that transitively
require java.sql* ... and having seen more than one, rules it
ambiguous and refuses to see it at all. In other words, this is
something that breaks when 10 or 11 is given a --release from the
past. 10 works fine building for 10, 11 works fine building for 11.

9 builds for itself just fine, and whatever the issue was in 10 and 11
got fixed in 12, so 12 and 13 can build for --release 9 with no trouble.

This is hacky.

Author: jcflack

pom.xml

@@ -67,18 +67,35 @@
 
 	<profiles>
 		<profile>
-			<id>release9</id>
+			<id>release10</id>
 			<activation>
-				<jdk>[9,)</jdk>
+				<jdk>[10,11)</jdk>
 			</activation>
 			<build>
 				<plugins>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-compiler-plugin</artifactId>
-						<version>3.8.1</version>
 						<configuration>
-							<release>9</release>
+							<release>10</release>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+
+		<profile>
+			<id>release11</id>
+			<activation>
+				<jdk>[11,12)</jdk>
+			</activation>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-compiler-plugin</artifactId>
+						<configuration>
+							<release>11</release>
 						</configuration>
 					</plugin>
 				</plugins>
@@ -108,6 +125,11 @@
 					<artifactId>maven-resources-plugin</artifactId>
 					<version>3.0.1</version><!-- later versions are Java 7+ -->
 				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-compiler-plugin</artifactId>
+					<version>3.8.1</version>
+				</plugin>
 			</plugins>
 		</pluginManagement>
 		<plugins>
@@ -116,6 +138,7 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
 					<encoding>${project.build.sourceEncoding}</encoding>
+					<release>9</release>
 				</configuration>
 			</plugin>
 			<plugin>