Upgrade to TypeScript 2.8.1 (#17617)

package.json

@@ -297,7 +297,7 @@
     "supertest-as-promised": "2.0.2",
     "tree-kill": "1.1.0",
     "ts-jest": "^22.0.4",
-    "typescript": "^2.7.2",
+    "typescript": "^2.8.1",
     "vinyl-fs": "^3.0.2",
     "xml2js": "0.4.19",
     "xmlbuilder": "9.0.4"

packages/kbn-pm/package.json

@@ -60,7 +60,7 @@
     "strong-log-transformer": "^1.0.6",
     "tempy": "^0.2.1",
     "ts-loader": "^3.5.0",
-    "typescript": "^2.7.2",
+    "typescript": "^2.8.1",
     "webpack": "^3.11.0",
     "wrap-ansi": "^3.0.1",
     "write-pkg": "^3.1.0"

packages/kbn-pm/yarn.lock

@@ -3572,9 +3572,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^2.7.2:
-  version "2.7.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
+typescript@^2.8.1:
+  version "2.8.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.1.tgz#6160e4f8f195d5ba81d4876f9c0cc1fbc0820624"
 
 uglify-js@^2.8.29:
   version "2.8.29"

yarn.lock

@@ -11539,9 +11539,9 @@ typedarray@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
 
-typescript@^2.7.2:
-  version "2.7.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.2.tgz#2d615a1ef4aee4f574425cdff7026edf81919836"
+typescript@^2.8.1:
+  version "2.8.1"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.8.1.tgz#6160e4f8f195d5ba81d4876f9c0cc1fbc0820624"
 
 ua-parser-js@^0.7.9:
   version "0.7.17"