Ensure explicit builds rebuild *everything*

The previous npm publish (but not official build publish) did not regenerate
some deleted files, so these were missing in the resulting package. This
happened because tsc was doing an incremental build, whilst npm thought it
was explicitly rebuilding everything.

Author: pimterry

package.json

@@ -16,7 +16,7 @@
   "scripts": {
     "start": "node-dev ./bin/run start",
     "build": "npm run build:src && npm run build:release",
-    "build:src": "rm -rf lib && tsc -b",
+    "build:src": "rm -rf lib && tsc -b --force",
     "build:release": "oclif-dev manifest && webpack && ts-node ./pack.ts",
     "prepack": "npm run build:src && oclif-dev manifest",
     "test": "TS_NODE_FILES=true mocha -r ts-node/register 'test/**/*.spec.ts'",