Revert "Up the dependency on canonicaljson to ^1.5.0"
Revert "Up the dependency on canonicaljson to ^1.5.0"

This reverts commit dcc4e0621cc101271efc573600bd7591a12cea7c.

matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse