Bump brouter from `218a088` to `e521eac`

Bumps brouter from 218a088 to e521eac.

Commits

• e521eac Merge pull request #747 from afischerdev/dynamic-range
• e5003f8 added some description for new var
• aa14738 recalc when wpt starts/ends in island situation
• 05420ac more protection for multiple wpt additions
• 003cc3d enabled track and road for use on dynamic range
• a2b5e28 disabled multible wpt additions
• 625ff0c Merge pull request #742 from afischerdev/new-voicehints
• 2712777 added a second chance to waypoints - beeline
• b9b0e21 repair vh END problems
• 60b7cf6 repair alternativ idx
• Additional commits viewable in compare view

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