test/fiml: set EM MVN rtol=1e-10

to make tests pass

Author: alyst

test/examples/political_democracy/by_parts.jl

@@ -273,7 +273,7 @@ end
 ### fiml
 ############################################################################################
 
-observed = SemObservedMissing(specification = spec_mean, data = dat_missing)
+observed = SemObservedMissing(specification = spec_mean, data = dat_missing, rtol_em = 1e-10)
 
 fiml = SemFIML(observed = observed, specification = spec_mean)