Default DPI value does not match Graphviz default value

[SimonMarquis]

Hi, I was wondering why we use a default value of 72dpi

• https://github.com/nidi3/graphviz-java/blob/f0c1fdfa37c8b9876ef1dcccec1a6c19219e727e/graphviz-java/src/main/java/guru/nidi/graphviz/attribute/validate/AttributeConfigs.java#L66
• https://github.com/nidi3/graphviz-java/blob/f0c1fdfa37c8b9876ef1dcccec1a6c19219e727e/graphviz-java/src/main/java/guru/nidi/graphviz/engine/ProcessOptions.java#L24-L26

instead of the 96dpi default value from Graphviz? https://graphviz.org/docs/attrs/dpi/

It makes the default renders not as crisp as they could be, as reported in https://github.com/vanniktech/gradle-dependency-graph-generator-plugin/issues/158