feat: Add support for projects with named modules

[slarse]

Fix #339

I labeled this as a feature, as previously we really did only support Java 8 and below. Now we have support for Java 9+, with modules. I've set the default compliance level to Java 11, as that's what we decided upon for the current paper.

Note that this also sets the Spoon version to the snapshot, as we need that for the module bugfix that went in today (see INRIA/spoon#3771).

[codecov]

Codecov Report

Merging #356 (1ae74ba) into master (290bdc0) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #356      +/-   ##
============================================
+ Coverage     89.06%   89.08%   +0.02%     
- Complexity      620      623       +3     
============================================
  Files            66       66              
  Lines          2002     2007       +5     
  Branches        234      234              
============================================
+ Hits           1783     1788       +5     
  Misses          134      134              
  Partials         85       85              

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/sorald/Constants.java	83.33% <100.00%> (+3.33%)	1.00 <0.00> (ø)
src/main/java/sorald/Repair.java	92.62% <100.00%> (+0.13%)	64.00 <4.00> (+3.00)
src/main/java/sorald/sonar/RuleVerifier.java	91.35% <100.00%> (ø)	12.00 <0.00> (ø)

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[khesoem]

Thanks @slarse