Update dependency tslint to ^5.20.0 (#99)

package.json

@@ -149,7 +149,7 @@
     "parcel-bundler": "^1.11.0",
     "sourcegraph": "^23.0.1",
     "tsc-watch": "^2.2.1",
-    "tslint": "^5.19.0",
+    "tslint": "^5.20.0",
     "typescript": "^3.1.6"
   },
   "dependencies": {

yarn.lock

@@ -1940,10 +1940,10 @@ detect-libc@^1.0.2:
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
   integrity sha1-+hN8S9aY7fVc1c0CrFWfkaTEups=
 
-diff@^3.2.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/diff/-/diff-3.5.0.tgz#800c0dd1e0a8bfbc95835c202ad220fe317e5a12"
-  integrity sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==
+diff@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.1.tgz#0c667cb467ebbb5cea7f14f135cc2dba7780a8ff"
+  integrity sha512-s2+XdvhPCOF01LRQBC8hf4vhbVmI2CGS5aZnxLJlT5FtdhPCDFq80q++zK2KlrVorVDdL5BOGZ/VfLrVtYNF+Q==
 
 diffie-hellman@^5.0.0:
   version "5.0.3"
@@ -5529,16 +5529,16 @@ tslint-react@^3.2.0:
   dependencies:
     tsutils "^2.13.1"
 
-tslint@^5.19.0:
-  version "5.19.0"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.19.0.tgz#a2cbd4a7699386da823f6b499b8394d6c47bb968"
-  integrity sha512-1LwwtBxfRJZnUvoS9c0uj8XQtAnyhWr9KlNvDIdB+oXyT+VpsOAaEhEgKi1HrZ8rq0ki/AAnbGSv4KM6/AfVZw==
+tslint@^5.20.0:
+  version "5.20.0"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.20.0.tgz#fac93bfa79568a5a24e7be9cdde5e02b02d00ec1"
+  integrity sha512-2vqIvkMHbnx8acMogAERQ/IuINOq6DFqgF8/VDvhEkBqQh/x6SP0Y+OHnKth9/ZcHQSroOZwUQSN18v8KKF0/g==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     builtin-modules "^1.1.1"
     chalk "^2.3.0"
     commander "^2.12.1"
-    diff "^3.2.0"
+    diff "^4.0.1"
     glob "^7.1.1"
     js-yaml "^3.13.1"
     minimatch "^3.0.4"