fix(checkstyle)!: remove the "file:" prefix from the artifact URI (#290)

Author: tahminator

lua/null-ls/builtins/diagnostics/checkstyle.lua

@@ -35,6 +35,7 @@ local function handle_checkstyle_output(params)
     for _, result in ipairs(results) do
         for _, location in ipairs(result.locations) do
             local col = location.physicalLocation.region.startColumn
+            local parsedUri = location.physicalLocation.artifactLocation.uri:gsub("^file:", "")
 
             table.insert(output, {
                 row = location.physicalLocation.region.startLine,
@@ -43,7 +44,7 @@ local function handle_checkstyle_output(params)
                 code = result.ruleId,
                 message = result.message.text,
                 severity = h.diagnostics.severities[result.level],
-                filename = location.physicalLocation.artifactLocation.uri,
+                filename = parsedUri,
             })
         end
     end