Update cached-path-relative ~> 1.0.2

Fixes #11, update all the package.json packages.

Dockerfile

@@ -7,6 +7,7 @@ for the get-pdf project."
 
 ARG TZ=Europe/Copenhagen
 
+RUN apt-get update
 RUN apt-get -y -qq install build-essential nano nginx openssh-server git openssh-client curl openssl \
                            libreadline-dev curl zlib1g zlib1g-dev libssl-dev libyaml-dev \
                            libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev \

getpdf-server/package.json

@@ -48,21 +48,21 @@
     "js-yaml": "^3.11.0",
     "mongojs": "^2.5.0",
     "morgan": "^1.8.0",
-    "npm": "^5.7.1",
+    "npm": "^6.8.0",
     "resource-router-middleware": "^0.6.0",
     "winston": "^2.4.0"
   },
   "devDependencies": {
     "babel-cli": "^6.9.0",
-    "babel-core": "^6.9.0",
+    "babel-core": "^6.26.3",
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-stage-0": "^6.5.0",
     "babelify": "^8.0.0",
     "eslint": "^3.1.1",
-    "grunt": "^1.0.2",
-    "grunt-browserify": "^5.2.0",
-    "nodemon": "^1.9.2",
-    "runjs": "^4.3.0"
+    "grunt": "^1.0.3",
+    "grunt-browserify": "^5.3.0",
+    "nodemon": "^1.18.10",
+    "runjs": "^4.4.2"
   },
   "engines": {
     "node": ">= 9.0"