Improved function documentation and add new test

fix NewFromFloat to use newCurrency instead of GetCurrency

Fix KGS currency template

GH-44 implement driver.Valuer and sql.Scanner for Amount and Currency (…

…#99)

* GH-44 implement driver.Valuer and sql.Scanner for money.Currency

This allows any Golang ORM which supports the sql.Scanner to
serialize (via sql.Driver) and deserialize (via sql.Scanner) a
money.Currency instance.

money.Amount is now a type alias to int64 which is already supported
by sql.Scanner as one of the core built-in data types

* GH-44 implement driver.Value and sql.Scanner for money.Money

Money's Value() function enables compatible
sql drivers to serialize a money.Money instance
to a single comma-delimited string value of
"amount,currency_code"

Money's Scan() function assumes that it receives
a single column where the src value is a comma-
delimited string in the format
"amount,currency_code"

While the storage format is up to the client when
the amount and currency are stored separately
a compatible scanner value can be created in
SQLite like this:

    SELECT amount || "," || currency as 'amount'

It is left to the client to decide to use Money's
Valuer implementation with a db annotation on
a property of type Money or else to store the
Amount and Currency values as two separate
columns and return them as a single joined
string field.

* GH-44 fix an edge case

strings.Split(src,,) will return
a slice with length 2 even if
one of the strings is empty

* fix: money.value tests

* refactor out the currency separator and make it customizable

clients can set money.DBMoneyValueSeparator to determine which
separator (e.g. "," "|" ";" ":" "AS" etc) to use when creating a single
driver.Value object to represent a money.Money instance as a single
string database field.

this allows the money package to support string values such as

10@USD
20;CAD
30|IRD
40 in GBP

etc

---------

Co-authored-by: Raymond <[email protected]>

update workflow and run tests on latest go version

Use appropriate number symbol for ZWL. ZWD should have unique code cu…

…rrency. (#133)

add NewFromFloat #108 (#116)

update: Fix ARS decimal and thousand separators

Add XOF and MGA currencies (#110)

This patch adds West African CFA franc (XOF) and Malagasy ariary (MGA)
currencies in order to provide them in go-money library.

See also:
- [West African CFA
  franc](https://en.wikipedia.org/wiki/West_African_CFA_franc);
- [Malagasy ariary](https://en.wikipedia.org/wiki/Malagasy_ariary);

Closes #109

Signed-off-by: r1cm3d <[email protected]>

#106 Split of small negative values doesn't work properly (#107)