style: add eslint configuration and fixed linter issues (#35)

* style: add eslint configuration as per bee-js

* chore: add `plugin:react/reocommended` in `.eslintrc`

Co-authored-by: nugaon <50576770+nugaon@users.noreply.github.com>

* chore: add `consistent` to `array-bracket-newline` as per review

* style: after automatic fixes with `npm run lint`

* style: fixed all linter errors

* refactor: fixed all linter warnings

* chore: added missing new line at end of `.prettierrc` file

Co-authored-by: nugaon <50576770+nugaon@users.noreply.github.com>

src/@types/react-identicons/index.d.ts

@@ -0,0 +1,15 @@
+declare module 'react-identicons' {
+  interface Props {
+    string: string
+    size?: number
+    padding?: number
+    bg?: string
+    fg?: string
+    palette?: string[]
+    count?: number
+    getColor?: () => string
+  }
+
+  const Identicon = (props: Props): JSXElementConstructor => ReactNode
+  export default Identicon
+}