feat!: set minimum node version to 12.13.0

[ewanharris]

Closes TIMOB-28343

JIRA: https://jira.appcelerator.org/browse/TIMOB-28343

[build]

	Fails
🚫	Tests have failed, see below for more information.
🚫	Test suite crashed on iOS simulator. Please see the crash log for more details.

	Messages
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 4 tests have failed There are 4 tests failing and 684 skipped out of 11625 total tests.

Tests:

Classname	Name	Time	Error
android.emulator.Titanium.UI.View	"after all" hook (5.0.2)	20.431	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
android.emulator.Titanium.UI.View	"after each" hook (5.0.2)	10.396	Error: timeout of 10000ms exceeded at Titanium.<anonymous> (/ti-mocha.js:6535:53723)
ios.macos.Titanium.Blob	image dimensions should be reported in pixels (10.15.7)	0.129	Error: expected 6 to be 11 value@file:///node_modules/should/cjs/should.js:356:23 postlayout@file:///ti.blob.test.js:483:33
ios.macos.Titanium.UI.WebView	beforeload (10.15.7)	30.007	Error: timeout of 30000ms exceeded file:///ti-mocha.js:4326:27

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