Bump bl from 2.2.0 to 2.2.1 in /xi_manager

Bumps [bl](https://github.com/rvagg/bl) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](https://github.com/rvagg/bl/compare/v2.2.0...v2.2.1)

Signed-off-by: dependabot[bot] <support@github.com>

xi_manager/package-lock.json

@@ -33,9 +33,9 @@
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
     },
     "bl": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.0.tgz",
-      "integrity": "sha512-wbgvOpqopSr7uq6fJrLH8EsvYMJf9gzfo2jCsL2eTy75qXPukA4pCgHamOQkZtY5vmfVtjB+P3LNlMHW5CEZXA==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
+      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
       "requires": {
         "readable-stream": "^2.3.5",
         "safe-buffer": "^5.1.1"