fix not support &. operation in low ruby version

app/services/management/school_report_service.rb

@@ -14,7 +14,7 @@ class Management::SchoolReportService
   def call
     schools = School.select(select_columns_sql)
 
-    keyword = params[:keyword]&.to_s&.strip
+    keyword = params[:keyword].try(:to_s).try(:strip)
     if keyword.present?
       schools = schools.where("schools.name LIKE :keyword OR schools.id LIKE :keyword", keyword: "%#{keyword}%")
     end