feat: Update dependencies to work with TypeScript v4 (toshi-toma#67)

BREAKING CHANGE: Update dependencies

Author: toshi-toma

.gitignore

@@ -5,4 +5,7 @@ node_modules
 *.log
 
 # mac
-.DS_STORE
+.DS_STORE
+
+# idea
+.idea

index.js

@@ -28,6 +28,8 @@ module.exports = {
     "@typescript-eslint/no-unused-vars": "error",
     "@typescript-eslint/explicit-member-accessibility": "off",
     "@typescript-eslint/no-object-literal-type-assertion": "off",
+    "no-use-before-define": "off",
+    "@typescript-eslint/no-use-before-define": ["error"],
     // React
     "react/jsx-filename-extension": ["error", { extensions: [".tsx"] }],
     "react/prop-types": ["off", {}],