Update LSP request methods and clang-format standard

This commit updates the LSP Request class by changing the ToJSON and FromJSON methods to use the override keyword instead of virtual, ensuring proper method overriding in derived classes. Additionally, the clang-format configuration is updated to use C++11 standard instead of C++20 (which does not exist on certain versions of clang-format)

* LSP/Request.h
* .clang-format

** Generated by CodeLite. **

Signed-off-by: Eran Ifrah <eran@codelite.org>

Author: eranif

.clang-format

@@ -44,7 +44,7 @@ SpacesInAngles:  false
 SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
-Standard: C++20
+Standard: C++11
 TabWidth: 4
 UseTab: Never
 SortIncludes: true

CodeLite/LSP/Request.h

@@ -21,8 +21,8 @@ class WXDLLIMPEXP_CL Request : public LSP::MessageWithParams
     void SetId(int id) { this->m_id = id; }
     int GetId() const { return m_id; }
 
-    virtual JSONItem ToJSON(const wxString& name) const;
-    virtual void FromJSON(const JSONItem& json);
+    JSONItem ToJSON(const wxString& name) const override;
+    void FromJSON(const JSONItem& json) override;
 
     /**
      * @brief is this request position dependent? (i.e. the response should be displayed where the request was