eslint fixes

[awave1]

eslint was generating a lot of errors because "use strict" wasn't present in test/MemoryFileSystem.js and test/MemoryFileSystemError.js

[jsf-clabot]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #52 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #52   +/-   ##
=======================================
  Coverage   96.24%   96.24%           
=======================================
  Files           4        4           
  Lines         293      293           
  Branches       67       67           
=======================================
  Hits          282      282           
  Misses         11       11

Impacted Files	Coverage Δ
lib/normalize.js	83.33% <ø> (ø)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #52 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #52   +/-   ##
=======================================
  Coverage   96.24%   96.24%           
=======================================
  Files           4        4           
  Lines         293      293           
  Branches       67       67           
=======================================
  Hits          282      282           
  Misses         11       11

Impacted Files	Coverage Δ
lib/normalize.js	83.33% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7ae73eb...7125e88. Read the comment docs.

[codecov]

Codecov Report

Merging #52 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #52   +/-   ##
=======================================
  Coverage   96.24%   96.24%           
=======================================
  Files           4        4           
  Lines         293      293           
  Branches       67       67           
=======================================
  Hits          282      282           
  Misses         11       11

Impacted Files	Coverage Δ
lib/normalize.js	83.33% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7ae73eb...7125e88. Read the comment docs.