upgrade to bs5-alpha3

still works fine, so no code changes needed.

package-lock.json

@@ -205,9 +205,9 @@
       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
     },
     "bootstrap": {
-      "version": "5.0.0-alpha2",
+      "version": "5.0.0-alpha3",
-      "resolved": "https://registry.npm.taobao.org/bootstrap/download/bootstrap-5.0.0-alpha2.tgz",
+      "resolved": "https://registry.npm.taobao.org/bootstrap/download/bootstrap-5.0.0-alpha3.tgz?cache=0&sync_timestamp=1605115180548&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fbootstrap%2Fdownload%2Fbootstrap-5.0.0-alpha3.tgz",
-      "integrity": "sha1-43zlg271fGkdfiNp9zgbhy0hX4M="
+      "integrity": "sha1-9au9OHQDg9a44EEhKu9eoiDn2qo="
     },
     "bootstrap4": {
       "version": "npm:bootstrap@4.5.0",

package.json

@@ -19,7 +19,7 @@
   "dependencies": {
     "@types/jquery": "^3.5.3",
     "autoprefixer": "^9.8.5",
-    "bootstrap": "^5.0.0-alpha2",
+    "bootstrap": "^5.0.0-alpha3",
     "bootstrap4": "npm:bootstrap@^4.5.0",
     "clean-css-cli": "^4.3.0",
     "esbuild": "^0.7.8",