multi-arch build script and version fixes

[codecov[bot]]

Codecov Report

Patch coverage: 69.56% and project coverage change: -0.02 :warning:

Comparison is base (498baa3) 60.02% compared to head (8a580ca) 60.01%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #435 +/- ## ========================================== - Coverage 60.02% 60.01% -0.02% ========================================== Files 120 120 Lines 10854 10868 +14 ========================================== + Hits 6515 6522 +7 - Misses 3640 3648 +8 + Partials 699 698 -1 ``` | [Impacted Files](https://codecov.io/gh/AthanorLabs/atomic-swap/pull/435?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [cliutil/utils.go](https://codecov.io/gh/AthanorLabs/atomic-swap/pull/435?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#diff-Y2xpdXRpbC91dGlscy5nbw==) | `57.52% <69.56%> (-0.06%)` | :arrow_down: | ... and [5 files with indirect coverage changes](https://codecov.io/gh/AthanorLabs/atomic-swap/pull/435/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None)

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