Octal escape sequences are not allowed in strict mode

[abelmokadem]

Found a bug that occurs when the snapshot contains octal escape sequences.

• version: 5.0.1
• platform: OS X 10.12.6
• expected behavior: snapshot should be imported
• actual behavior: library errors out due to octal escape sequence

evalmachine.<anonymous>:51
    <entry seq="2">Set key \REGISTRY\USER\S-1-5-21-2052111302-1214440339-682003330-500\Software\Microsoft\Office\12.0\Excel\Resiliency\StartupItems\2v$ to value NULL</entry>


SyntaxError: Octal escape sequences are not allowed in strict mode.
    at new Script (vm.js:74:7)
    at createScript (vm.js:246:10)
    at Object.runInNewContext (vm.js:291:10)
    at loadSnaps (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-core/src/file-system.js:31:8)
    at Object.loadSnapshots (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-core/src/file-system.js:64:17)
    at Object.keys.forEach.file (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-core/src/index.js:144:26)
    at Array.forEach (<anonymous>)
    at Function.pruneSnapshots [as prune] (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-core/src/index.js:142:27)
    at Context._pruneSnapshots (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-it/src/index.js:19:8)
    at Context.<anonymous> (/Users/ash/Projects/aegon/apidas/wildfire-client/node_modules/snap-shot-it/src/index.js:143:20)