chore: support vue2 by using vue-demi

Author: EastSun5566

package.json

@@ -18,10 +18,17 @@
     "lodash.merge": "^4.6.2",
     "lodash.set": "^4.3.2",
     "lodash.setwith": "^4.3.2",
-    "lodash.topath": "^4.5.2"
+    "lodash.topath": "^4.5.2",
+    "vue-demi": "^0.13.11"
   },
   "peerDependencies": {
-    "vue": "^3.0.0"
+    "@vue/composition-api": "^1.0.0-rc.1",
+    "vue": "^2.0.0 || >=3.0.0"
+  },
+  "peerDependenciesMeta": {
+    "@vue/composition-api": {
+      "optional": true
+    }
   },
   "devDependencies": {
     "@rollup/plugin-commonjs": "^15.1.0",

src/useForm.ts

@@ -1,6 +1,6 @@
 import {
   reactive, computed, ref, Ref, watch,
-} from 'vue'
+} from 'vue-demi'
 import { RuleItem } from 'async-validator'
 import DeepValidator from './deepValidator'
 import {

src/utils.ts

@@ -1,4 +1,4 @@
-import { Ref, ComponentPublicInstance } from 'vue'
+import { Ref, ComponentPublicInstance } from 'vue-demi'
 import _toPath from 'lodash.topath'
 import _get from 'lodash.get'
 import _set from 'lodash.set'

tests/utils.ts

@@ -1,7 +1,7 @@
 /* eslint-disable @typescript-eslint/no-empty-function */
 // eslint-disable-next-line import/no-extraneous-dependencies
 import { mount } from '@vue/test-utils'
-import { defineComponent } from 'vue'
+import { defineComponent } from 'vue-demi'
 
 export type RenderHookResult<T> = {
   result?: T;

yarn.lock

@@ -11160,6 +11160,11 @@ vm-browserify@^1.0.1:
   resolved "https://registry.yarnpkg.com/vm-browserify/-/vm-browserify-1.1.2.tgz#78641c488b8e6ca91a75f511e7a3b32a86e5dda0"
   integrity sha512-2ham8XPWTONajOR0ohOKOHXkm3+gaBmGut3SRuu75xLd/RRaY6vqgh8NBYYk7+RW3u5AtzPQZG8F10LHkl0lAQ==
 
+vue-demi@^0.13.11:
+  version "0.13.11"
+  resolved "https://registry.yarnpkg.com/vue-demi/-/vue-demi-0.13.11.tgz#7d90369bdae8974d87b1973564ad390182410d99"
+  integrity sha512-IR8HoEEGM65YY3ZJYAjMlKygDQn25D5ajNFNoKh9RSDMQtlzCxtfQjdQgv9jjK+m3377SsJXY8ysq8kLCZL25A==
+
 vue-eslint-parser@^7.0.0, vue-eslint-parser@^7.3.0:
   version "7.3.0"
   resolved "https://registry.yarnpkg.com/vue-eslint-parser/-/vue-eslint-parser-7.3.0.tgz#894085839d99d81296fa081d19643733f23d7559"