Update all packages to the most recent version. Drops support for Node 4 (out of LTS).

package.json

@@ -32,53 +32,53 @@
     "test": "npm run lint && npm run unit"
   },
   "dependencies": {
-    "@thumbsup/theme-cards": "^1.1.0",
+    "@thumbsup/theme-cards": "^1.2.0",
     "@thumbsup/theme-classic": "^1.1.0",
-    "@thumbsup/theme-mosaic": "^1.1.0",
     "@thumbsup/theme-flow": "^1.2.1",
+    "@thumbsup/theme-mosaic": "^1.1.0",
     "JSONStream": "^1.3.5",
-    "async": "^2.5.0",
-    "better-sqlite3": "^4.1.0",
-    "boxen": "^2.0.0",
-    "chalk": "^2.4.1",
+    "async": "^3.0.1",
+    "better-sqlite3": "^5.4.0",
+    "boxen": "^4.0.0",
+    "chalk": "^2.4.2",
     "command-exists": "^1.2.8",
-    "debug": "^4.1.0",
+    "debug": "^4.1.1",
     "event-stream": "^4.0.1",
-    "fs-extra": "^7.0.1",
+    "fs-extra": "^8.0.1",
     "fs-readdir-recursive": "^1.0.0",
-    "handlebars": "^4.0.12",
+    "handlebars": "^4.1.2",
     "ini": "^1.3.4",
-    "insight": "^0.10.1",
+    "insight": "^0.10.3",
     "less": "^3.9.0",
     "listr": "^0.14.3",
     "lodash": "^4.17.11",
-    "micromatch": "^3.1.10",
-    "moment": "^2.22.1",
-    "readdir-enhanced": "^2.2.2",
-    "resolve-pkg": "^1.0.0",
+    "micromatch": "^4.0.2",
+    "moment": "^2.24.0",
+    "readdir-enhanced": "^2.2.4",
+    "resolve-pkg": "^2.0.0",
     "slugify": "^1.3.4",
-    "through2": "^3.0.0",
-    "thumbsup-downsize": "^2.2.0",
+    "through2": "^3.0.1",
+    "thumbsup-downsize": "^2.2.1",
     "url-join": "^4.0.0",
-    "yargs": "^12.0.5",
-    "zen-observable": "^0.8.11"
+    "yargs": "^13.2.4",
+    "zen-observable": "^0.8.14"
   },
   "devDependencies": {
-    "glob": "^7.1.3",
+    "glob": "^7.1.4",
     "gm": "^1.23.1",
     "injectmd": "^1.0.0",
     "istanbul": "^0.4.5",
     "markdown-toc": "^1.1.0",
-    "mocha": "^5.1.1",
-    "mock-fs": "^4.7.0",
+    "mocha": "^6.1.4",
+    "mock-fs": "^4.10.0",
     "mock-spawn": "^0.2.6",
     "require-all": "^3.0.0",
     "require-lint": "^1.3.0",
     "should": "^13.2.3",
-    "sinon": "^7.2.0",
+    "sinon": "^7.3.2",
     "standard": "^12.0.1",
-    "stream-mock": "^1.2.0",
-    "tmp": "0.0.33"
+    "stream-mock": "^2.0.2",
+    "tmp": "^0.1.0"
   },
   "standard": {
     "ignore": [