Updated plantuml 1.2017.15 to 1.2019.13

[ubmarco]

The version used does not yet support the stdlib.

[weirongxu]

Upgrade plantuml.jar will make the repository bigger and bigger, Maybe we should consider letting users use local plantuml.jar?

[ubmarco]

I agree. What about a hybrid approach?

1. I generally like the idea of plantuml-previewer.vim bringing its own version of plantuml.jar because user can work with it out of the box. However in this case I would find it reasonable to update plantuml.jar let's say every year.
2. Introduce a vimrc option to pass a custom plantuml.jar path for users that need a more up-to-date version.

[ubmarco]

There might also be 2 more (less preferable) options:

1. a feature to auto-update the own plantuml.jar once an update is detected; this would however involve starting an HTTP(S) connection which can easily fail due to various reasons
2. pull in plantuml.jar from another repo using Git submodules; however I am not sure if all plugin managers know how to correctly deal with submodules.

[weirongxu]

OK, I will check this jar file, There are already has a variable g:plantuml_previewer#plantuml_jar_path to configure local plantuml.jar path

[weirongxu]

I see that you are using version 1.2019.12, Why not update directly to 1.2019.13?

[ubmarco]

I'm using Arch and 1.2019.12 is the current version (https://www.archlinux.org/packages/community/any/plantuml/). But we can also go to 1.2019.13. Shall I update the PR?

[ubmarco]

I built the plantuml.jar 1.2019.13 locally and force-pushed to my fork, so there's only 1 commit to merge.

~/Downloads/plantuml-1.2019.13 $ java -jar plantuml.jar -version
PlantUML version 1.2019.13 (Tue Dec 10 18:18:29 CET 2019)
(GPL source distribution)
Java Runtime: OpenJDK Runtime Environment
JVM: OpenJDK 64-Bit Server VM
Java Version: 13.0.1+9
Operating System: Linux
Default Encoding: UTF-8
Language: en
Country: US
Machine: tux01
PLANTUML_LIMIT_SIZE: 4096
Processors: 8
Max Memory: 4,139,778,048
Total Memory: 260,046,848
Free Memory: 254,817,648
Used Memory: 5,229,200
Thread Active Count: 1

The environment variable GRAPHVIZ_DOT has not been set
Dot executable is /usr/sbin/dot
Dot version: dot - graphviz version 2.42.3 (0)
Installation seems OK. File generation OK

[weirongxu]

Thanks