chore(api)!: Error instead of returning 0 on invalid inputs to conv.* functions

[hairyhenderson]

This is a breaking change, but will result in more correct rendering.

Instead of quietly returning 0, a number of functions in the conv namespace will now return an error if the input is invalid.

This includes:

• conv.ToInt64, conv.ToInt, conv.ToInt64s, conv.ToInts, conv.ToFloat64, conv.ToFloat64s, conv.ParseInt, conv.ParseFloat, conv.ParseUint, conv.Atoi

Because these functions are used by some other functions, this introduces stricter input validation for these functions:

• coll.Flatten
• crypto.PBKDF2, crypto.Bcrypt, crypto.RSAGenerateKey, crypto.EncryptAES, crypto.DecryptAES, crypto.DecryptAESBytes
• math.Abs, math.Add, math.Mul, math.Sub, math.Div, math.Rem, math.Pow, math.Seq, math.Max, math.Min, math.Ceil, math.Floor, math.Round
• net.CIDRHost, net.CIDRSubnets, net.CIDRSubnetSizes
• random.ASCII, random.Alpha, random.AlphaNum, random.String, random.Number, random.Float
• regexp.FindAll, regexp.Split
• strings.Abbrev, strings.WordWrap
• time.Nanosecond, time.Microsecond, time.Millisecond, time.Second, time.Minute, time.Hour