[Snyk] Security upgrade fonttools from 4.38.0 to 4.43.0

[bashtage]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - requirements-test.txt

⚠️ Warning

``` matplotlib 3.5.3 requires fonttools, which is not installed. ```

#### Vulnerabilities that will be fixed ##### By pinning: Severity | Priority Score (*) | Issue | Upgrade | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------|:-------------------------  | **661/1000**
**Why?** Recently disclosed, Has a fix available, CVSS 7.5 | XML External Entity (XXE) Injection
[SNYK-PYTHON-FONTTOOLS-6133203](https://snyk.io/vuln/SNYK-PYTHON-FONTTOOLS-6133203) | `fonttools:`
`4.38.0 -> 4.43.0`
| No | No Known Exploit (*) Note that the real score may have changed since the PR was raised. Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded. Check the changes in this PR to ensure they won't cause issues with your project. ------------ **Note:** *You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.* For more information: 🧐 [View latest project report](https://app.snyk.io/org/bashtage/project/0343c721-0d95-4329-952c-b1c1e0b52d44?utm_source=github&utm_medium=referral&page=fix-pr) 🛠 [Adjust project settings](https://app.snyk.io/org/bashtage/project/0343c721-0d95-4329-952c-b1c1e0b52d44?utm_source=github&utm_medium=referral&page=fix-pr/settings) 📚 [Read more about Snyk's upgrade and patch logic](https://support.snyk.io/hc/en-us/articles/360003891078-Snyk-patches-to-fix-vulnerabilities) [//]: # (snyk:metadata:{"prId":"6b7cb0af-4040-4a4d-a3e6-9d878a7bc34e","prPublicId":"6b7cb0af-4040-4a4d-a3e6-9d878a7bc34e","dependencies":[{"name":"fonttools","from":"4.38.0","to":"4.43.0"}],"packageManager":"pip","projectPublicId":"0343c721-0d95-4329-952c-b1c1e0b52d44","projectUrl":"https://app.snyk.io/org/bashtage/project/0343c721-0d95-4329-952c-b1c1e0b52d44?utm_source=github&utm_medium=referral&page=fix-pr","type":"auto","patch":[],"vulns":["SNYK-PYTHON-FONTTOOLS-6133203"],"upgrade":[],"isBreakingChange":false,"env":"prod","prType":"fix","templateVariants":["updated-fix-title","pr-warning-shown","priorityScore"],"priorityScoreList":[661],"remediationStrategy":"vuln"}) --- **Learn how to fix vulnerabilities with free interactive lessons:** 🦉 [XML External Entity (XXE) Injection](https://learn.snyk.io/lesson/xxe/?loc=fix-pr)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ab3335e) 99.59% compared to head (2572c86) 99.59%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #572 +/- ## ========================================== - Coverage 99.59% 99.59% -0.01% ========================================== Files 98 98 Lines 17245 17238 -7 Branches 2461 2459 -2 ========================================== - Hits 17176 17169 -7 Misses 30 30 Partials 39 39 ```

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