Bump apollo-server from 2.7.1 to 2.25.4 in /graphql-server#4

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mastermax-berman/flowkey-code-challenge:masterfrom

dependabot/npm_and_yarn/graphql-server/apollo-server-2.25.4max-berman/flowkey-code-challenge:dependabot/npm_and_yarn/graphql-server/apollo-server-2.25.4Copy head branch name to clipboard