ready: eslint deps are devDependencies

[alex-a-pereira]

Issue

Addresses this issue that I opened earlier today

#595

✏️ Description

Move eslint and eslint-config-airbnb dependencies into the devDependencies object in package.json.

Thie prevents yarn from printing warnings:

➤ YN0002: │ @iterable/react-native-sdk@npm:1.3.20 [b01c5] doesn't provide eslint-plugin-import (p67cd9), requested by eslint-config-airbnb
➤ YN0002: │ @iterable/react-native-sdk@npm:1.3.20 [b01c5] doesn't provide eslint-plugin-jsx-a11y (p16ac4), requested by eslint-config-airbnb
➤ YN0002: │ @iterable/react-native-sdk@npm:1.3.20 [b01c5] doesn't provide eslint-plugin-react (pf10d0), requested by eslint-config-airbnb
➤ YN0002: │ @iterable/react-native-sdk@npm:1.3.20 [b01c5] doesn't provide eslint-plugin-react-hooks (p53156), requested by eslint-config-airbnb