Bump express from 4.17.1 to 4.17.3 in /posts-service#48

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dependabot/npm_and_yarn/posts-service/express-4.17.3Shubhamdutta2000/Microservice-Application-with-Queuing-Mechanism-using-Node-Express:dependabot/npm_and_yarn/posts-service/express-4.17.3Copy head branch name to clipboard