Update dependency tsc-watch to ^2.4.0

Author: renovate-bot

package.json

@@ -148,7 +148,7 @@
     "mkdirp-promise": "^5.0.1",
     "parcel-bundler": "^1.11.0",
     "sourcegraph": "^23.0.1",
-    "tsc-watch": "^2.2.1",
+    "tsc-watch": "^2.4.0",
     "tslint": "^5.20.0",
     "typescript": "^3.1.6"
   },

yarn.lock

@@ -5501,10 +5501,10 @@ trim-right@^1.0.1:
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
   integrity sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=
 
-tsc-watch@^2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/tsc-watch/-/tsc-watch-2.2.1.tgz#6e41a091e07d26dbcf5c815bfb514435ded33286"
-  integrity sha512-E61+ozEutLDgmXN+1+rkoCaUmd2g/cpa4mpEPMA3gPi89PBJiAcIUtH0xdCxeChXlR9TcuwOuTqu5jZDRhgfRw==
+tsc-watch@^2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/tsc-watch/-/tsc-watch-2.4.0.tgz#0b3b9d98d8032ba02acae1d38a7ebb16da0591f7"
+  integrity sha512-HTNRQm/P2YdP34b7bhaSOjVQ/YdTJGkNYyAD0scEcK7qXX7BWsBG8n3YlYHC9a6mX//gs5ouWQ3DXrBWjVp6rQ==
   dependencies:
     cross-spawn "^5.1.0"
     node-cleanup "^2.1.2"