The addTypeValue function doesn't properly escape BEFORE and AFTER values

[jarri2di]

The addTypeValue function uses quoted literal values instead of escaped values, causing errors during migrations.

node-pg-migrate/src/operations/types.ts

Lines 95 to 96 in de87ee6

	const beforeStr = before ? ` BEFORE ${mOptions.literal(before)}` : ''
	const afterStr = after ? ` AFTER ${mOptions.literal(after)}` : ''

I believe the lines should be updated to the following:

const beforeStr = before ? ` BEFORE ${escapeValue(before)}` : ''
const afterStr = after ? ` AFTER ${escapeValue(after)}` : ''

Happy to submit a PR if that would be welcome.