Implement things

[Luro02]

This PR ...

• closes Identifier should not contain type triggers for substring/sublist #255
• closes UnusedCodeElement lints field that is used by a method #228
• closes Fixing UnusedCodeCheck and UseDifferentVisibility for variables #239
• closes UnusedCodeElement lints field that is used by a method #228
• closes ConditionalIfCheck (and maybe others) should not crash with ifs that do not have a then block if(a); #235
• closes Update Spoon and use bug fixes #238
• closes UseFormatString should not trigger for "^(?!.*[;" + System.lineSeparator() + "]).*$" #216
• closes Only emit unused code element lint for public elements if the main method is present #215
• closes Remove workaround for checking effectively final on array.length with next spoon release #199
• closes RegexCheck should check uses of String for known methods that take regex. #217
• closes Arrays.fill should not trigger for mutable classes #245
• closes Suggestions should never have the qualified type and minimize the use of parentheses. #241
• closes Identifier contains value should ignore small strings. #232
• closes LINE_BREAK is a non-descriptive name #224
• closes Remove STATIC_INTERFACE problem type and instead emit REDUNDANT_MODIFIER #222
• closes VariablesHaveDescriptiveNames should ignore vector coordinates like x1, x2, ... and y1, y2 #221
• closes What happens with negative numbers in Math.floor lint? #220
• closes Detect catches of ArrayIndexOutOfBoundsException, NullPointerException, ... that are guaranteed to be used for modifying control-flow #227
• closes Detect all public/default-visibility fields in the UseDifferentVisibility lint #219
• closes Detect multithreading specific stuff #204
• closes Detect binary ops on boolean (|, &, ...) #190
• closes ImportTypes should not trigger for HashMap.Entry #223
• closes ConcreteCollectionCheck crashes with array #226
• closes Allow catching IllegalArgumentException when calling Enum::valueOf #192
• closes Limit the number of annotations emitted by UseFormatString/UseStringFormatted #242
• closes Detect //TODO / // TODO comments #218