Fix bootloader skip for Slaesh's stick

[puddly]

Perform pin toggling before startup and extend timeout. Broken by #104. Fixes #106.

Instructions for setting up zigpy-znp with the custom deps deployment addon are here: https://github.com/zigpy/zigpy-znp#testing-dev-with-home-assistant-os. Use the following config for this branch:

apk: []
pypi:
  - git+https://github.com/puddly/zigpy-znp.git@puddly/fix-slaesh-bootloader
  - zigpy==0.42.0

[codecov-commenter]

Codecov Report

Merging #107 (a683baf) into dev (8a4e08e) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #107      +/-   ##
==========================================
+ Coverage   98.67%   98.72%   +0.05%     
==========================================
  Files          44       44              
  Lines        3854     3852       -2     
==========================================
  Hits         3803     3803              
+ Misses         51       49       -2     

Impacted Files	Coverage Δ
zigpy_znp/api.py	98.05% <100.00%> (+0.27%)	⬆️
zigpy_znp/zigbee/application.py	96.20% <100.00%> (+0.17%)	⬆️

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