fix: package exports fixes (#512)

package.json

@@ -7,9 +7,26 @@
         "type": "git",
         "url": "https://github.com/gravity-ui/uikit"
     },
-    "main": "build/cjs/index.js",
-    "module": "build/esm/index.js",
-    "types": "build/esm/index.d.ts",
+    "exports": {
+        ".": {
+            "require": "./build/cjs/index.js",
+            "import": "./build/esm/index.js"
+        },
+        "./*": {
+            "require": "./build/cjs/*.js",
+            "import": "./build/esm/*.js"
+        },
+        "./styles/*": "./styles/*"
+    },
+    "main": "./build/cjs/index.js",
+    "module": "./build/esm/index.js",
+    "types": "./index.d.ts",
+    "typesVersions": {
+        "*": {
+            "*": ["./build/esm/*"],
+            "index.d.ts": ["./build/esm/index.d.ts"]
+        }
+    },
     "sideEffects": [
         "*.css",
         "*.scss"

src/toaster-singleton-react-18.ts

@@ -4,4 +4,5 @@ import {ToasterSingleton} from './components/Toaster/ToasterSingleton';
 ToasterSingleton.injectReactDOMClient(ReactDOMClient);
 
 // in SSR case
-export const toaster = typeof window === 'object' ? new ToasterSingleton() : null;
+export const toaster =
+    typeof window === 'object' ? new ToasterSingleton() : ({} as ToasterSingleton);

src/toaster-singleton.ts

@@ -1,4 +1,5 @@
 import {ToasterSingleton} from './components/Toaster/ToasterSingleton';
 
 // in SSR case
-export const toaster = typeof window === 'object' ? new ToasterSingleton() : null;
+export const toaster =
+    typeof window === 'object' ? new ToasterSingleton() : ({} as ToasterSingleton);