Move formatToParts to es2018

Author: rastenis

src/lib/es2018.intl.d.ts

@@ -38,4 +38,15 @@ declare namespace Intl {
             options?: PluralRulesOptions,
         ): string[];
     };
+
+    type NumberFormatPartTypes = "compact" | "currency" | "decimal" | "exponentInteger" | "exponentMinusSign" | "exponentSeparator" | "fraction" | "group" | "infinity" | "integer" | "literal" | "minusSign" | "nan" | "plusSign" | "percentSign" | "unit" | "unknown";
+
+    interface NumberFormatPart {
+        type: NumberFormatPartTypes;
+        value: string;
+    }
+
+    interface NumberFormat {
+        formatToParts(number?: number): NumberFormatPart[];
+    }
 }

src/lib/esnext.intl.d.ts

@@ -1,12 +1 @@
-declare namespace Intl {
-    type NumberFormatPartTypes = "compact" | "currency" | "decimal" | "exponentInteger" | "exponentMinusSign" | "exponentSeparator" | "fraction" | "group" | "infinity" | "integer" | "literal" | "minusSign" | "nan" | "plusSign" | "percentSign" | "unit" | "unknown";
-
-    interface NumberFormatPart {
-        type: NumberFormatPartTypes;
-        value: string;
-    }
-
-    interface NumberFormat {
-        formatToParts(number?: number | bigint): NumberFormatPart[];
-    }
-}
+declare namespace Intl {}