Add support for Sunblast's additional trap mod

[user-74]

Adds support for parsing the 'skills which throw traps throw up to X additional traps' mod

Description of the problem being solved:

Sunblast's unique mod "Skills which Throw Traps throw up to 2 additional Traps" was not being parsed correctly.

Steps taken to verify a working solution:

• Equipped a trap that benefits from additional traps thrown (e.g. Lightning Trap)
• Equipped Sunblast
• Verified Avg. traps per throw increases by 2 (i.e. 1 -> 3).
• Verified other sources of additional traps still increase the avg correctly (e.g. Cluster Traps, 3 -> 5)

Link to a build that showcases this PR:

https://pobb.in/LiBgCVh7UIem

Before screenshot:

After screenshot: