Fix decimal (#96)

* Fix up handling tenth decimals

For example, this corrects the printing of 0.5, 0.1, 2.5, and so on inside the input.

* Use exponentation operator where applicable

* Clean up decimal sanitization code.

* Don't redefine 'safeNumber'

src/index.js

@@ -46,16 +46,27 @@ const IntlCurrencyInput = ({
   // to prevent a malformed config object
   const safeConfig = useMemo(() => () => ({ ...defaultConfig, ...config }), [defaultConfig, config]);
 
+  const clean = (number) => {
+    if (typeof number === 'number') return number;
+    return Number(number.toString().replace(/[^0-9-]/g, ''));
+  }
+
   const normalizeValue = number => {
     const { formats: { number: { [currency]: { maximumFractionDigits: numDigits } } } } = safeConfig();
+    let safeNumber = number;
 
 
     // all input numbers must be a float point (for the cents portion). This is a fallback in case of integer ones.
-    const safeNumber = Number.isInteger(number) ? Number(number) * 100 : number;
+    if (typeof number === 'string') {
+      safeNumber = clean(number);
+      if (safeNumber % 1 !== 0) safeNumber = safeNumber.toFixed(numDigits);
+    } else {
+      safeNumber = Number.isInteger(number) ? Number(number) * (10 ** numDigits) : number.toFixed(numDigits);
+    }
 
     // strips everything that is not a number (positive or negative)
     // then divide it by 10 power the maximum fraction digits.
-    return Number(safeNumber.toString().replace(/[^0-9-]/g, '')) / 10 ** numDigits;
+    return clean(safeNumber) / (10 ** numDigits);
   };
 
   const calculateValues = (inputFieldValue) => {