MacOS Installer Package

[mrpalide]

Did you run make format && make check? Yes

Fixes # MacOS Installer Package

Changes:

• fix mac installer script
• add step to release for create both amd64 and arm64 installer on AppVeyor

How to test this PR:

• Install jq and wget by brew install ... on your machine
• Clone this PR
• Run ./scripts/mac_installer/create_installer.sh

[jdknives]

 skycoinci@Mac-mini  ~/go/src/github.com/skycoin/skywire   fix/darwin-dmg-package ±  ./scripts/mac_installer/create_installer.sh -x
./scripts/mac_installer/create_installer.sh: line 9: go: command not found
WARN: Unknown option (ignored): -x
No output flag provided, storing installer to the current directory: /Users/skycoinci/go/src/github.com/skycoin/skywire/
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  382k    0  382k    0     0   375k      0 --:--:--  0:00:01 --:--:--  375k
Fetching binary releases from 
wget: missing URL
Usage: wget [OPTION]... [URL]...

Try `wget --help' for more options.

Is it supposed to be possible to build the installers without providing the signing certificates? It seems like the download link is not constructed correctly. Its empty when called.

[mrpalide]

Is it supposed to be possible to build the installers without providing the signing certificates? It seems like the download link is not constructed correctly. Its empty when called.

Based on your output, I found a useless go command and fixed it.
Also you need to installed jq, for getting last release tag from github. I forgot to note about it on PR description, and now added. Install it by brew install jq.