(v8.x) src: update NODE_MODULE_VERSION to 57
Node.js 8.0.0 is API/ABI forward-compatible with V8 6.0. The current module version is 55 and corresponds to V8 5.8. This increments the number by two to prevent incompatibility with modules compiled from Node master.
/cc @nodejs/v8 @jasnell @MylesBorins
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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