fix: update palette shades to include 950 and adjust error messages accordingly

Author: ibodev1

src/consts.ts

@@ -2,5 +2,5 @@ import type { ColorResultOptions } from './types.js';
 
 export const initialOptions: Omit<ColorResultOptions, 'primaryColor'> = {
   mainShade: 500,
-  shades: [50, 100, 200, 300, 400, 500, 600, 700, 800, 900],
+  shades: [50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 950],
 };

src/utils.ts

@@ -40,7 +40,7 @@ export const checkParam = (palette: Palette): boolean => {
     }
   } else {
     if (shade && !initialOptions.shades.includes(shade)) {
-      throw new PaletteError(`Main shade '${shade}' must be one of: 50, 100, 200, 300, 400, 500, 600, 700, 800, 900.`);
+      throw new PaletteError(`Main shade '${shade}' must be one of: 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, 950.`);
     }
   }
 

test/lib.test.ts

@@ -20,6 +20,7 @@ describe('Palette Generation Tests', () => {
         '700': '#c78d00',
         '800': '#ab7600',
         '900': '#916000',
+        '950': '#845500',
         DEFAULT: '#ffbd00',
       },
     });
@@ -72,6 +73,7 @@ describe('Palette Generation Tests', () => {
         '700': '#ab7600',
         '800': '#916000',
         '900': '#784b00',
+        '950': '#6c4000',
         DEFAULT: '#ffbd00',
       },
       secondary: {