fix typos + remove one benchmark

benchmarks/string/pascal.bench.ts

@@ -5,13 +5,10 @@ describe('pascal', () => {
   bench('with valid input', () => {
     _.pascal('hello world')
   })
-  bench('wiht camelCase input', () => {
+  bench('with camelCase input', () => {
     _.pascal('fooBar')
   })
   bench('with non alphanumerics', () => {
     _.pascal('Exobase Starter_flash AND-go')
   })
-  bench('With null input', () => {
-    _.pascal(null as any)
-  })
 })