use isString from lodash

Author: pikax

rollup.config.js

@@ -26,6 +26,7 @@ function createEntry(options) {
       'lodash/camelCase',
       'lodash/upperFirst',
       'lodash/kebabCase',
+      'lodash/isString',
       'lodash/flow'
     ],
     plugins: [resolve()],

src/utils.ts

@@ -1,12 +1,9 @@
 import camelCase from 'lodash/camelCase'
 import upperFirst from 'lodash/upperFirst'
 import kebabCase from 'lodash/kebabCase'
+import isString from 'lodash/isString'
 import flow from 'lodash/flow'
 
 const pascalCase = flow(camelCase, upperFirst)
 
-function isString(val: unknown): val is String {
-  return typeof val === 'string'
-}
-
 export { kebabCase, pascalCase, isString }