mock out wasm imports in jest

Signed-off-by: Michael Telatynski <[email protected]>

__mocks__/wasmMock.js

@@ -0,0 +1 @@
+module.exports = "css-file-stub";

package.json

@@ -215,6 +215,7 @@
       "<rootDir>/node_modules/matrix-react-sdk/test/setupTests.js"
     ],
     "moduleNameMapper": {
+      "\\.wasm$": "<rootDir>/__mocks__/wasmMock.js",
       "\\.(css|scss)$": "<rootDir>/__mocks__/cssMock.js",
       "\\.(gif|png|svg|ttf|woff2)$": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/imageMock.js",
       "\\$webapp/i18n/languages.json": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/languages.json",