Fix jsdoc failure on async code (#506)
Fix jsdoc failure on async code (#506)

We need jsdoc 3.5 to support the async/await syntax.
matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk