Fix implicit numeric widening #160
                
     Merged
            
            
          
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On my PC,
sbt compileaborts due to the compile error regarding this numeric widening.I think this error is enabled by
tpolecatplubin in https://github.com/cquiroz/scala-java-time/blob/master/project/plugins.sbt#L16It is weird that CI ignores this error.