Alt Key / Meta key integration with tmux

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Dear team,

I absolutely love hyper, however I found my typical key binding for tmux does not apply.
e.g.
bind-key -n M-0 if-shell "tmux list-windows|grep ^0" "select-window -t 0" "new-window -t 0"

This line binds Meta key with 0 to perform creation or selection of new window.
Would you direct me where I can change the key behaviour?
I found the current symptom, when M-0 is pressed is keyboard scan code modifier (If I am not mistaken).

Hyper 0.8.3
Electron 1.4.0
darwin x64 15.6.0

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Sorry this was indeed duplication of #330