cannot load such file -- rexml/xpath_parser

[rchekaluk]

Reference ruckus/quickbooks-ruby#598

When using gem quickbooks-ruby, with the xml at bottom, roxml throws error:

$HOME/lib/roxml/xml/references.rb:62:in `require': cannot load such file -- rexml/xpath_parser (LoadError)

Failing XML:

<Customer domain="QBO" sparse="false">
  <Id>58</Id>
  <SyncToken>0</SyncToken>
  <MetaData>
    <CreateTime>2024-05-21T02:37:36-07:00</CreateTime>
    <LastUpdatedTime>2024-05-21T02:37:36-07:00</LastUpdatedTime>
  </MetaData>
  <FullyQualifiedName>Company B</FullyQualifiedName>
  <CompanyName>Company B</CompanyName>
  <DisplayName>Company B</DisplayName>
  <PrintOnCheckName>Company B</PrintOnCheckName>
  <Active>true</Active>
  <PrimaryEmailAddr>
    <Address>boogiewoogie@army.gov</Address>
  </PrimaryEmailAddr>
  <Taxable>true</Taxable>
  <Job>false</Job>
  <BillWithParent>false</BillWithParent>
  <Balance>0</Balance>
  <BalanceWithJobs>0</BalanceWithJobs>
  <CurrencyRef name="United States Dollar">USD</CurrencyRef>
  <PreferredDeliveryMethod>Print</PreferredDeliveryMethod>
  <IsProject>false</IsProject>
  <ClientEntityId>0</ClientEntityId>
</Customer>