Release @khanacademy/perseus@49.1.2 · Khan/perseus

#2034 8e9b2395d Thanks @catandthemachines! - Removing final usage of createReactClass.
#2025 b52310d1b Thanks @nishasy! - [SR] Linear graph - add grab handle description and aria lives
#2037 b80e7882b Thanks @somewhatabstract! - Nothing has changed, but our action requires a changeset per package and I don't know how to do an infrastructure update like this and pass that check
#2033 881c0aac3 Thanks @nishasy! - [Interactive Graph][axis labels] Make default x & y axis labels TeX on load
Updated dependencies [b80e7882b]:
- @khanacademy/kas@0.4.8
- @khanacademy/keypad-context@1.0.10
- @khanacademy/kmath@0.1.22
- @khanacademy/math-input@22.0.5
- @khanacademy/perseus-core@3.0.4
- @khanacademy/perseus-linter@1.2.10
- @khanacademy/pure-markdown@0.3.19
- @khanacademy/simple-markdown@0.13.12

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