Incorrect linking of hairpin endpoints

[craigsapp]

In this example:

There should be a cresc. under the second note of the second measure. Instead the cresc. finds an ending [ in the next measure that it should not (in particular since it is already owned by another <. Make it so that < and ] cannot be matched when they are in different subspines (other than subspines 0/1).

Test data:

**kern  **dynam
1c  p <
1d  [[
=   =
*   *^
1c  p < .
1d  .   <
1e  [   .
*   *v  *v
=   =
*   *^
1c  p < .
!   !   !LO:HP:a
1d  .   <
1e  [   .
*   *v  *v
*-  *-

[craigsapp]

Fixed with commit https://github.com/rism-digital/verovio/commit/992524465a6de956204fb7d69424207514fe1f1c

Also works with decrescendos:

**kern  **dynam
1c  f >
1d  ]]
=   =
*   *^
1c  f > .
1d  .   >
1e  ]   .
*   *v  *v
=   =
*   *^
1c  f > .
!   !   !LO:HP:a
1d  .   >
1e  ]   .
*   *v  *v
*-  *-