Switching to use @types where possible in build

build/package.json

@@ -3,18 +3,28 @@
   "version": "1.0.0",
   "devDependencies": {
     "@types/azure": "0.9.19",
+    "@types/debounce": "^1.0.0",
     "@types/documentdb": "1.10.2",
     "@types/es6-collections": "0.5.31",
     "@types/es6-promise": "0.0.33",
     "@types/glob": "^7.1.1",
+    "@types/gulp": "^4.0.5",
+    "@types/gulp-concat": "^0.0.32",
+    "@types/gulp-filter": "^3.0.32",
     "@types/gulp-json-editor": "^2.2.31",
+    "@types/gulp-rename": "^0.0.33",
+    "@types/gulp-sourcemaps": "^0.0.32",
     "@types/gulp-uglify": "^3.0.5",
+    "@types/gulp-util": "^3.0.34",
     "@types/mime": "0.0.29",
     "@types/minimatch": "^2.0.29",
     "@types/node": "8.0.33",
     "@types/request": "^2.47.0",
     "@types/rimraf": "^2.0.2",
+    "@types/through": "^0.0.29",
+    "@types/through2": "^2.0.34",
     "@types/uglify-es": "^3.0.0",
+    "@types/underscore": "^1.8.9",
     "@types/xml2js": "0.0.33",
     "azure-storage": "^2.1.0",
     "documentdb": "1.13.0",
@@ -31,4 +41,4 @@
     "postinstall": "npm run compile",
     "npmCheckJs": "tsc --noEmit"
   }
-}
+}