Depending on Guava 26.0-jre introduces test failures

[Capstan]

java.lang.NoSuchFieldError: JAVA_ISO_CONTROL
	at com.github.fge.uritemplate.parse.CharMatchers.<clinit>(CharMatchers.java:40)

https://github.com/fge/uri-template/blob/master/src/main/java/com/github/fge/uritemplate/parse/CharMatchers.java

[Capstan]

See also fge/uri-template#4 (comment) Will probably have to clone fge/uri-template into java-json-tools if we want to keep Guava up to date.