fix: Update Wails to latest version to fix webkit2gtk issue, update to go 1.16

[ttys3]

1. fixup Wails apps not displaying web ui problem under newer webkit

related issue: wailsapp/wails#658

Refs: rogchap/wombat#56

see also wailsapp/wails@87df51f

2. fixup github action workflow failure

Run echo ::set-env name=VERSION::$(git rev-parse --short HEAD)
Error: Unable to process command '::set-env name=VERSION::56bff31' successfully.
Error: The `set-env` command is disabled. Please upgrade to using Environment Files or opt into unsecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_COMMANDS` environment variable to `true`. For more information see: github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands

Refs: actions/toolkit#641 (comment)

https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable

[Splode]

Brilliant, thanks for the excellent contribution!