[BUG] Implication operator `|=>` is not highlighted properly like its counterpart `|->`

Describe the bug A clear and concise description of what the bug is.

Environment (please complete the following information):

Steps to reproduce

Expected behavior |=> should be fully highlighted in yellow (my theme) like |-> is.

Actual behavior |= are not highlighted properly.

mshr-h / vscode-verilog-hdl-support