Bump shell-quote from 1.7.2 to 1.7.3 in /src

Bumps [shell-quote](https://github.com/substack/node-shell-quote) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/substack/node-shell-quote/releases)
- [Changelog](https://github.com/substack/node-shell-quote/blob/master/CHANGELOG.md)
- [Commits](https://github.com/substack/node-shell-quote/compare/v1.7.2...1.7.3)

---
updated-dependencies:
- dependency-name: shell-quote
  dependency-type: indirect
...

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

README.md

@@ -2,8 +2,7 @@
 Cucko is a Google Chrome browser extension that lets you hide the number of likes, retweets and replies a tweet has.
 
 ## Installation
-
-You can no longer install this extension.
+[Download the extension](https://chrome.google.com/webstore/detail/cuckoo-for-twitter/agjappnhmfoffegbhnakelgilanmnibb) from the Chrome web store here.
 
 ## Development
 To get set up for local development, follow these steps:

src/package-lock.json

@@ -4520,9 +4520,9 @@
       "dev": true
     },
     "shell-quote": {
-      "version": "1.7.2",
-      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.7.2.tgz",
-      "integrity": "sha512-mRz/m/JVscCrkMyPqHc/bczi3OQHkLTqXHEFu0zDhK/qfv3UcOA4SVmRCLmos4bhjr9ekVQubj/R7waKapmiQg==",
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.7.3.tgz",
+      "integrity": "sha512-Vpfqwm4EnqGdlsBFNmHhxhElJYrdfcxPThu+ryKS5J8L/fhAwLazFZtq+S+TWZ9ANj2piSQLGj6NQg+lKPmxrw==",
       "dev": true
     },
     "signal-exit": {