feat(util): add a subtractFields helper function to subtract numeric values from an object

src/Util.spec.ts

@@ -259,50 +259,50 @@ describe('Util', () => {
 
         it('should throw on error response', async () => {
             await expect(Util.fetch('https://¤.com')).rejects.toThrow(Error);
+        });
+    });
 
-            describe('path functions', () => {
-                it('should get extension from path', () => {
-                    expect(Util.getExtension('file.txt')).toBe('.txt');
-                    expect(Util.getExtension('path/to/file.txt')).toBe('.txt');
-                    expect(Util.getExtension('file')).toBe('');
-                    expect(Util.getExtension('path/to/file.txt')).toBe('.txt');
-                    expect(Util.getExtension('path/to/.txt')).toBe('.txt');
-                    expect(Util.getExtension('.txt')).toBe('.txt');
-                    expect(Util.getExtension('path/to/file.txt.')).toBe('.');
-                });
-
-                it('should get file from path', () => {
-                    expect(Util.getFile('file.txt')).toBe('file.txt');
-                    expect(Util.getFile('path/to/file.txt')).toBe('file.txt');
-                });
-
-                it('should get base file without extension', () => {
-                    expect(Util.getBaseFile('file.txt')).toBe('file');
-                    expect(Util.getBaseFile('path/to/file.txt')).toBe('file');
-                    expect(Util.getBaseFile('file')).toBe('file');
-                });
-            });
+    describe('path functions', () => {
+        it('should get extension from path', () => {
+            expect(Util.getExtension('file.txt')).toBe('.txt');
+            expect(Util.getExtension('path/to/file.txt')).toBe('.txt');
+            expect(Util.getExtension('file')).toBe('');
+            expect(Util.getExtension('path/to/file.txt')).toBe('.txt');
+            expect(Util.getExtension('path/to/.txt')).toBe('.txt');
+            expect(Util.getExtension('.txt')).toBe('.txt');
+            expect(Util.getExtension('path/to/file.txt.')).toBe('.');
+        });
 
-            describe('string trim functions', () => {
-                it('should trim spaces', () => {
-                    expect(Util.trim('  hello  ')).toBe('hello');
-                });
-
-                it('should trim custom characters', () => {
-                    expect(Util.trim('xxhelloxx', 'x')).toBe('hello');
-                    expect(Util.trim('xxhello😭xx', 'x😭')).toBe('hello');
-                });
-
-                it('should trim start only', () => {
-                    expect(Util.trimStart('  hello  ')).toBe('hello  ');
-                    expect(Util.trimStart('😭hello😭', '😭')).toBe('hello😭');
-                });
-
-                it('should trim end only', () => {
-                    expect(Util.trimEnd('  hello  ')).toBe('  hello');
-                    expect(Util.trimEnd('😭hello😭', '😭')).toBe('😭hello');
-                });
-            });
+        it('should get file from path', () => {
+            expect(Util.getFile('file.txt')).toBe('file.txt');
+            expect(Util.getFile('path/to/file.txt')).toBe('file.txt');
+        });
+
+        it('should get base file without extension', () => {
+            expect(Util.getBaseFile('file.txt')).toBe('file');
+            expect(Util.getBaseFile('path/to/file.txt')).toBe('file');
+            expect(Util.getBaseFile('file')).toBe('file');
+        });
+    });
+
+    describe('string trim functions', () => {
+        it('should trim spaces', () => {
+            expect(Util.trim('  hello  ')).toBe('hello');
+        });
+
+        it('should trim custom characters', () => {
+            expect(Util.trim('xxhelloxx', 'x')).toBe('hello');
+            expect(Util.trim('xxhello😭xx', 'x😭')).toBe('hello');
+        });
+
+        it('should trim start only', () => {
+            expect(Util.trimStart('  hello  ')).toBe('hello  ');
+            expect(Util.trimStart('😭hello😭', '😭')).toBe('hello😭');
+        });
+
+        it('should trim end only', () => {
+            expect(Util.trimEnd('  hello  ')).toBe('  hello');
+            expect(Util.trimEnd('😭hello😭', '😭')).toBe('😭hello');
         });
     });
 

src/Util.ts

@@ -477,11 +477,10 @@ export function trimEnd(value: string, chars: string = ' '): string {
  * Property lookup (e.g. `obj.Foo` or `obj.foo`) will resolve to the same underlying key, regardless of casing.
  * Only affects string-based property access (not symbols).
  *
- * @template T
- * @param {T} obj - The original object.
- * @returns {T} A proxied object with case-insensitive property access.
+ * @param obj - The original object.
+ * @returns A proxied object with case-insensitive property access.
  */
-export function caseInsensitive<T extends Record<string, any>>(obj: any): T {
+export function caseInsensitive(obj: any): Record<string, any> {
     return new Proxy(obj, {
         get(target, prop, receiver) {
             if (typeof prop === 'string') {