title: read_excel truncates numbers in spite of setting digits option
body: <p>I am trying to read an excel file into R with <code>read_excel()</code> function from the "readxl" package.
  Numbers in cells in the excel file have 3 decimal places, e.g. 
  <code>0,684 1,338 74,296</code>. In the R dataframe the same numbers are <code>0,684 1,34 74,3</code>.
  Why did only 3 digits remain?</p>
  
  <p>I have set <code>options(digits=5)</code> (tried different values as well) .</p>
  
  <p>I have also tried to <code>read_excel("file.xlsx", col_types = c("text", "text", "text"))</code> (which gave me strings: <code>74.296000000000006 1.3380000000000001 0.68400000000000005</code>) and then convert to numbers with<code>as.numeric()</code>, but again the numbers have been truncated: <code>0,684 1,34 74,3</code>.</p>
  
  <p>Please, let me know if you know the reason :)</p>