lsp-dart-run error fixed

[lazyskulptor]

error message was

error in process filter: Wrong type argument: hash-table-p

[cheerio-pixel]

This will fail in the case lsp-use-plists is nil. Is better if you instead use lsp-get, which takes care of deciding if it's a plist or a hash-table.

[Integral-Tech]

@lazyskulptor Could you please replace plist with lsp-get?

[lazyskulptor]

@lazyskulptor Could you please replace plist with lsp-get?

Sorry I'm super busy lately.
May I can view this code at June.
I'll try apply what you talked.