chore(deps-dev): bump rollup from 1.14.6 to 1.15.1

Bumps [rollup](https://github.com/rollup/rollup) from 1.14.6 to 1.15.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v1.14.6...v1.15.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -57,7 +57,7 @@
     "nyc": "^14.1.1",
     "prettier": "^1.18.2",
     "rimraf": "^2.6.3",
-    "rollup": "^1.14.6",
+    "rollup": "^1.15.1",
     "rollup-plugin-filesize": "^6.1.0",
     "rollup-plugin-prettier": "^0.6.0"
   },

yarn.lock

@@ -5027,10 +5027,10 @@ rollup-plugin-prettier@^0.6.0:
     magic-string "0.25.1"
     prettier "^1.0.0"
 
-rollup@^1.14.6:
-  version "1.14.6"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.14.6.tgz#4d1165bdcdac4d0510ce127495c42f238098943d"
-  integrity sha512-A8f54Fms9PAG2VBLBg/XOBgN6tRQKgroltD86f+gF5+6eRmAAlFBJAFV0K7MHl2aHOCcrATWO1B8SAjVD2Ehsw==
+rollup@^1.15.1:
+  version "1.15.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.15.1.tgz#76580d9a3e7e8632530bcc5809baf431e9e16aa9"
+  integrity sha512-JErZxFKs0w7wpHZXWonAlom1Jezo0gJ7mf7JHTjOAjFGKAqNMEnlzEjMYhy6cqHgSfSPj/idVscuW+Lo6y6AoQ==
   dependencies:
     "@types/estree" "0.0.39"
     "@types/node" "^12.0.7"