Use react native adjustFontSizeToFit on home screen balance

Author: tanx

src/component/label.js

@@ -15,7 +15,7 @@ const balanceStyles = StyleSheet.create({
   numeral: {
     fontFamily: 'WorkSans ExtraLight',
     fontSize: font.sizeXXXL,
-    lineHeight: font.lineHeightXXXL,
+    lineHeight: null,
   },
   unit: {
     fontFamily: 'WorkSans Regular',
@@ -35,7 +35,13 @@ BalanceLabel.propTypes = {
 };
 
 export const BalanceLabelNumeral = ({ children, style }) => (
-  <Text style={[balanceStyles.numeral, style]}>{children}</Text>
+  <Text
+    style={[balanceStyles.numeral, style]}
+    adjustsFontSizeToFit={true}
+    numberOfLines={1}
+  >
+    {children}
+  </Text>
 );
 
 BalanceLabelNumeral.propTypes = {