Consistent `defaultOptions`

[pete-murphy]

There's a mix of approaches to defining defaultOptions, mostly we're using unsafeCoerce {} and letting the implementation fill it in, but I think we always do know the actual defaults by referencing the specification. Collator at least explicitly defines the default options

purescript-js-intl/src/JS/Intl/Collator.purs

Lines 53 to 62 in a9a08ba

	defaultOptions :: { | CollatorOptions }
	defaultOptions =
	{ localeMatcher: LocaleMatcher.toString LocaleMatcher.BestFit
	, usage: Usage.toString Usage.Sort
	, sensitivity: Sensitivity.toString Sensitivity.Variant
	, ignorePunctuation: false
	, numeric: false
	, caseFirst: CaseFirst.toString CaseFirst.False
	, collation: Collation.toString Collation.Default
	}

If we did the same for all the service constructors, we should be able to do away with the unsafeCoerce shenanigans.