replace immediate with queueMicrotask

package.json

@@ -43,7 +43,6 @@
     "double-ended-queue": "2.1.0-0",
     "fetch-cookie": "2.1.0",
     "fruitdown": "1.0.2",
-    "immediate": "3.3.0",
     "level": "6.0.1",
     "level-codec": "9.0.2",
     "level-write-stream": "1.0.0",

packages/node_modules/pouchdb-utils/package.json

@@ -17,7 +17,6 @@
     "./src/cloneBinaryObject.js": "./src/cloneBinaryObject-browser.js",
     "./src/env/hasLocalStorage.js": "./src/env/hasLocalStorage-browser.js",
     "./src/explainError.js": "./src/explainError-browser.js",
-    "./src/isBinaryObject.js": "./src/isBinaryObject-browser.js",
-    "./src/nextTick.js": "./src/nextTick-browser.js"
+    "./src/isBinaryObject.js": "./src/isBinaryObject-browser.js"
   }
 }

packages/node_modules/pouchdb-utils/src/nextTick.js

@@ -1,5 +1,7 @@
-function nextTick(fn) {
-  process.nextTick(fn);
-}
+const nextTick = typeof queueMicrotask === "function"
+  ? queueMicrotask
+  : function nextTick(fn) {
+    Promise.resolve().then(fn);
+  };
 
 export default nextTick;