Link export doesn't work on adoc/md export since v1.4.0

[rlespinasse]

Describe the bug
Since v1.4.0, the adoc/md export can't export the links in an drawio file using compressed diagrams

To Reproduce

$ drawio-exporter -V
drawio-exporter 1.4.0

$ drawio-exporter --format adoc file.drawio
+ export file : file.drawio
- export page 1 : Page-1
\ generate png file
\ generate adoc file
\ include links in adoc file

Expected behavior

$ drawio-exporter -V
drawio-exporter 1.3.2

$ drawio-exporter --format adoc file.drawio
+ export file : file.drawio
- export page 1 : Page-1
\ generate png file
\ generate adoc file
\ include links in adoc file
link 'Link' to https://github.com/rlespinasse/drawio-exporter