Update spellchecker to reenable spellcheck on linux w/electron v4

package.json

@@ -92,7 +92,7 @@
     "reselect": "4.0.0",
     "rimraf": "2.6.2",
     "semver": "5.4.1",
-    "spellchecker": "3.4.4",
+    "spellchecker": "3.5.1",
     "tar": "4.4.8",
     "testcheck": "1.0.0-rc.2",
     "tmp": "0.0.33",

yarn.lock

@@ -5938,7 +5938,7 @@ mz@^2.3.1:
     object-assign "^4.0.1"
     thenify-all "^1.0.0"
 
-nan@^2.0.0, nan@^2.10.0, nan@^2.11.0, nan@^2.9.2:
+nan@^2.10.0, nan@^2.11.0, nan@^2.9.2:
   version "2.11.1"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.11.1.tgz#90e22bccb8ca57ea4cd37cc83d3819b52eea6766"
   integrity sha512-iji6k87OSXa0CcrLl9z+ZiYSuR2o+c0bGuNmXdrhTQTakxytAFsC56SArGYoiHlJlFoHSnvmhpceZJaXkVuOtA==
@@ -8665,13 +8665,13 @@ speedometer@~0.1.2:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/speedometer/-/speedometer-0.1.4.tgz#9876dbd2a169d3115402d48e6ea6329c8816a50d"
 
-spellchecker@3.4.4:
-  version "3.4.4"
-  resolved "https://registry.yarnpkg.com/spellchecker/-/spellchecker-3.4.4.tgz#5c5384786e207efd3b76d18c77ae928971cd7b52"
-  integrity sha512-l0s86YZs5+PzATeFbqD0sTSMEF7bgzqUYgxrU8+nBSw3V19tzRYKMi+hDGG6v8MskWeG2dRK0Q79sqs1eGIKwQ==
+spellchecker@3.5.1:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/spellchecker/-/spellchecker-3.5.1.tgz#72cc2bcbb0c610536bc2a36df1ced9b2665816cc"
+  integrity sha512-R1qUBsDZzio+7MFZN6/AtPUe5NGvnc0wywckuXAlp9akASaYSFqKuI5O8p3rSiA+yKP31qC7Iijjoygmzkh6xw==
   dependencies:
     any-promise "^1.3.0"
-    nan "^2.0.0"
+    nan "^2.10.0"
 
 split-string@^3.0.1, split-string@^3.0.2:
   version "3.1.0"