Merge pull request quantlibnode#7 from quantlibnode/1.9

merge 1.9 to master

bump version to 0.2.1

Merge pull request quantlibnode#5 from quantlibnode/1.8

update for QuantLib 1.8

0.1.4

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trying to fix node-pre-gyp

minor fix before publishing 0.1.1

Initial Commit