Update dependencies.

package.json

@@ -2,7 +2,15 @@
   "name": "scanty",
   "version": "0.3.2",
   "description": "A small library for building toy lexers.",
-  "keywords": ["lex", "lexer", "scan", "scanner", "token", "tokenize", "tokenizer"],
+  "keywords": [
+    "lex",
+    "lexer",
+    "scan",
+    "scanner",
+    "token",
+    "tokenize",
+    "tokenizer"
+  ],
   "homepage": "https://github.com/kroogs/scanty",
   "author": "Justin Krueger <justin@kroo.gs>",
   "license": "MIT",
@@ -29,20 +37,20 @@
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",
-    "babel-core": "^6.26.0",
-    "babel-eslint": "^8.0.1",
-    "babel-loader": "^7.1.2",
-    "babel-preset-env": "^1.6.1",
+    "babel-core": "^6.26.3",
+    "babel-eslint": "^9.0.0",
+    "babel-loader": "^8.0.2",
+    "babel-preset-env": "^1.7.0",
     "babel-preset-stage-0": "^6.24.1",
-    "coveralls": "^3.0.0",
-    "esdoc": "^1.0.3",
+    "coveralls": "^3.0.2",
+    "esdoc": "^1.1.0",
     "esdoc-standard-plugin": "^1.0.0",
-    "eslint": "^4.9.0",
-    "eslint-plugin-import": "^2.8.0",
-    "jest": "^21.2.1",
-    "jest-cli": "^21.2.1",
-    "prettier": "^1.7.4",
-    "webpack": "^3.8.1"
+    "eslint": "^5.5.0",
+    "eslint-plugin-import": "^2.14.0",
+    "jest": "^23.6.0",
+    "jest-cli": "^23.6.0",
+    "prettier": "^1.14.2",
+    "webpack": "^4.18.0"
   },
   "jest": {
     "moduleDirectories": [
@@ -51,6 +59,6 @@
     ]
   },
   "dependencies": {
-    "yaemit": "^1.8.0"
+    "yaemit": "^2.0.0"
   }
 }