Range requests retrieve one extra byte

[andreasg123]

Range requests request one extra byte because the end of the range is specified as the byte after the range and not the last byte of the range. I could submit a PR if desired but the fix is trivial.

--- a/src/source/remote.js
+++ b/src/source/remote.js
@@ -55,7 +55,7 @@ class RemoteSource extends BaseSource {
       headers: {
         ...this.headers,
         Range: `bytes=${slices
-          .map(({ offset, length }) => `${offset}-${offset + length}`)
+          .map(({ offset, length }) => `${offset}-${offset + length - 1}`)
           .join(',')
         }`,
       },
@@ -111,7 +111,7 @@ class RemoteSource extends BaseSource {
     const response = await this.client.request({
       headers: {
         ...this.headers,
-        Range: `bytes=${offset}-${offset + length}`,
+        Range: `bytes=${offset}-${offset + length - 1}`,
       },
       signal,
     });