Merge branch 'go1.16'

merge go1.16 changes

This includes embedded files for releases (no extra 'data' directory!)
and support for a custom language file directory, allowing one to
customize the text accross the app.

package-lock.json

@@ -227,11 +227,6 @@
       "resolved": "https://registry.npm.taobao.org/entities/download/entities-1.1.2.tgz?cache=0&sync_timestamp=1602897347667&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fentities%2Fdownload%2Fentities-1.1.2.tgz",
       "integrity": "sha1-vfpzUplmTfr9NFKe1PhSKidf6lY="
     },
-    "esbuild": {
-      "version": "0.8.46",
-      "resolved": "https://registry.npm.taobao.org/esbuild/download/esbuild-0.8.46.tgz",
-      "integrity": "sha1-j8cjDOMBmxLiVTOZ8MA4dacpwms="
-    },
     "escalade": {
       "version": "3.1.1",
       "resolved": "https://registry.npm.taobao.org/escalade/download/escalade-3.1.1.tgz?cache=0&sync_timestamp=1602567437752&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fescalade%2Fdownload%2Fescalade-3.1.1.tgz",