Bump elliptic from 6.4.1 to 6.5.3#173

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.4.1 to 6.5.3. <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/indutny/elliptic/commit/8647803dc3d90506aa03021737f7b061ba959ae1"><code>8647803</code></a> 6.5.3</li> <li><a href="https://github.com/indutny/elliptic/commit/856fe4d99fe7b6200556e6400b3bf585b1721bec"><code>856fe4d</code></a> signature: prevent malleability and overflows</li> <li><a href="https://github.com/indutny/elliptic/commit/60489415e545efdfd3010ae74b9726facbf08ca8"><code>6048941</code></a> 6.5.2</li> <li><a href="https://github.com/indutny/elliptic/commit/9984964457c9f8a63b91b01ea103260417eca237"><code>9984964</code></a> package: bump dependencies</li> <li><a href="https://github.com/indutny/elliptic/commit/ec735edde187a43693197f6fa3667ceade751a3a"><code>ec735ed</code></a> utils: leak less information in <code>getNAF()</code></li> <li><a href="https://github.com/indutny/elliptic/commit/71e4e8e2f5b8f0bdbfbe106c72cc9fbc746d3d60"><code>71e4e8e</code></a> 6.5.1</li> <li><a href="https://github.com/indutny/elliptic/commit/7ec66ffa255079260126d87b1762a59ea10de5ea"><code>7ec66ff</code></a> short: add infinity check before multiplying</li> <li><a href="https://github.com/indutny/elliptic/commit/ee7970b92f388e981d694be0436c4c8036b5d36c"><code>ee7970b</code></a> travis: really move on</li> <li><a href="https://github.com/indutny/elliptic/commit/637d0216b58de7edee4f3eb5641295ac323acadb"><code>637d021</code></a> travis: move on</li> <li><a href="https://github.com/indutny/elliptic/commit/5ed0babb6467cd8575a9218265473fda926d9d42"><code>5ed0bab</code></a> package: update deps</li> <li>Additional commits viewable in <a href="https://github.com/indutny/elliptic/compare/v6.4.1...v6.5.3">compare view</a></li> </ul> </details> <br /> [](https://help.github.com/articles/configuring-automated-security-fixes) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/mattbdean/Helium/network/alerts). </details>