[bugfix] html escape special characters in text instead of totally removing them (#719)

* remove minify dependency

* tidy up some tests

* remove pre + postformat funcs

* rework sanitization + formatting

* update tests

* add some more markdown tests

vendor/github.com/tdewolff/parse/v2/strconv/price.go

@@ -1,83 +0,0 @@
-package strconv
-
-// AppendPrice will append an int64 formatted as a price, where the int64 is the price in cents.
-// It does not display whether a price is negative or not.
-func AppendPrice(b []byte, price int64, dec bool, milSeparator byte, decSeparator byte) []byte {
-	if price < 0 {
-		if price == -9223372036854775808 {
-			x := []byte("92 233 720 368 547 758 08")
-			x[2] = milSeparator
-			x[6] = milSeparator
-			x[10] = milSeparator
-			x[14] = milSeparator
-			x[18] = milSeparator
-			x[22] = decSeparator
-			return append(b, x...)
-		}
-		price = -price
-	}
-
-	// rounding
-	if !dec {
-		firstDec := (price / 10) % 10
-		if firstDec >= 5 {
-			price += 100
-		}
-	}
-
-	// calculate size
-	n := LenInt(price) - 2
-	if n > 0 {
-		n += (n - 1) / 3 // mil separator
-	} else {
-		n = 1
-	}
-	if dec {
-		n += 2 + 1 // decimals + dec separator
-	}
-
-	// resize byte slice
-	i := len(b)
-	if i+n > cap(b) {
-		b = append(b, make([]byte, n)...)
-	} else {
-		b = b[:i+n]
-	}
-
-	// print fractional-part
-	i += n - 1
-	if dec {
-		for j := 0; j < 2; j++ {
-			c := byte(price%10) + '0'
-			price /= 10
-			b[i] = c
-			i--
-		}
-		b[i] = decSeparator
-		i--
-	} else {
-		price /= 100
-	}
-
-	if price == 0 {
-		b[i] = '0'
-		return b
-	}
-
-	// print integer-part
-	j := 0
-	for price > 0 {
-		if j == 3 {
-			b[i] = milSeparator
-			i--
-			j = 0
-		}
-
-		c := byte(price%10) + '0'
-		price /= 10
-		b[i] = c
-		i--
-		j++
-	}
-	return b
-}