Eclipse updates for 4 12

[fvgh]

Provided updates for Eclipse based formatters as they were released for Eclipse 4.12 / 2019-06
Following updates are provided:

• JDT 4.12 (major fixes, should also cover most of the issues reported with Continue formatting other files if one file formatting fails #411)
• CDT 9.8 (better support of C11 and above)
• WTP 3.14 (minor model change for HTML5)
• GrEclipse 3.4 (Upgrade to Groovy-Indy 3.00 fixes some parser errors, for example bounded wildcards issue reported in Groovy's "apply" adds semicolons #237)

[fvgh]

@nedtwigg If you don't mind, I do this all in one PR. I would appreciate if you could use this branch to provide new versions for:

• spotless-eclipse-cdt
• spotless-eclipse-groovy
• spotless-eclipse-wtp

I don't think that we need a new spotless-eclipse-jdt version. The behaviour has changed (actually some versions ago). Have a look at my comments on the UTs if you are interested.
Anyhow, don't see a need to change the code. Would propose to wait with a new versions when I (finally) finished my work on #292.

In the change logs I left a few TBDs. Will fill the blanks as soon as we have the new versions.

[fvgh]

This PR will provide fix for #422 .

[nedtwigg]

Looks great! In progress...

[nedtwigg]

All three have been published to jcenter and mavencentral.

[fvgh]

@nedtwigg Tested the new defaults with some projects, including JUnit. Since I used old code versions, nothing changed except for Groovy (see also changes in 1c44cda ).

FYI: I came across a known WTP JSON bug. Since it is already part of 3.8, I see no reason not to upgrade the default.

[nedtwigg]

Released in x.24.0