esbuild 0.16.7

Include file loader strings in metafile imports (#2731)

Bundling a file with the file loader copies that file to the output directory and imports a module with the path to the copied file in the default export. Previously when bundling with the file loader, there was no reference in the metafile from the JavaScript file containing the path string to the copied file. With this release, there will now be a reference in the metafile in the imports array with the kind file-loader:
```
 {
   ...
   "outputs": {
     "out/image-55CCFTCE.svg": {
       ...
     },
     "out/entry.js": {
       "imports": [
+        {
+          "path": "out/image-55CCFTCE.svg",
+          "kind": "file-loader"
+        }
       ],
       ...
     }
   }
 }
```
Fix byte counts in metafile regarding references to other output files (#2071)

Previously files that contained references to other output files had slightly incorrect metadata for the byte counts of input files which contributed to that output file. So for example if app.js imports image.png using the file loader and esbuild generates out.js and image-LSAMBFUD.png, the metadata for how many bytes of out.js are from app.js was slightly off (the metadata for the byte count of out.js was still correct). The reason is because esbuild substitutes the final paths for references between output files toward the end of the build to handle cyclic references, and the byte counts needed to be adjusted as well during the path substitution. This release fixes these byte counts (specifically the bytesInOutput values).
The alias feature now strips a trailing slash (#2730)

People sometimes add a trailing slash to the name of one of node's built-in modules to force node to import from the file system instead of importing the built-in module. For example, importing util imports node's built-in module called util but importing util/ tries to find a package called util on the file system. Previously attempting to use esbuild's package alias feature to replace imports to util with a specific file would fail because the file path would also gain a trailing slash (e.g. mapping util to ./file.js turned util/ into ./file.js/). With this release, esbuild will now omit the path suffix if it's a single trailing slash, which should now allow you to successfully apply aliases to these import paths.