fix: resolve trim-canvas import error in SignatureCanvas

- Fixed runtime error "TypeError: (0 , import_trim_canvas.default) is not a function"
  caused by incompatible default/named exports in trim-canvas.
- Updated import to a universal approach compatible with:
  Node.js, TypeScript, and all package managers/bundlers.
- getTrimmedCanvas now safely trims canvas regardless of environment.

Author: hamzaapplogika

package.json

@@ -82,7 +82,7 @@
     "@babel/runtime": "^7.17.9",
     "@types/signature_pad": "^2.3.0",
     "signature_pad": "^2.3.2",
-    "trim-canvas": "^0.1.0"
+    "trim-canvas": "^0.1.2"
   },
   "devDependencies": {
     "@agilgur5/tsconfig": "^0.0.1",