Update dependency acorn to v7.2.0 (#378)

Author: renovate-bot

package.json

@@ -35,7 +35,7 @@
   },
   "dependencies": {
     "@ampproject/remapping": "0.2.0",
-    "acorn": "7.1.1",
+    "acorn": "7.2.0",
     "acorn-walk": "7.1.1",
     "estree-walker": "2.0.1",
     "google-closure-compiler": "20200406.0.0",

yarn.lock

@@ -449,10 +449,10 @@ acorn-walk@7.1.1:
   resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-7.1.1.tgz#345f0dffad5c735e7373d2fec9a1023e6a44b83e"
   integrity sha512-wdlPY2tm/9XBr7QkKlq0WQVgiuGTX6YWPyRyBviSoScBuLfTVQhvwg6wJ369GJ/1nPfTLMfnrFIfjqVg6d+jQQ==
 
-acorn@7.1.1:
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.1.1.tgz#e35668de0b402f359de515c5482a1ab9f89a69bf"
-  integrity sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==
+acorn@7.2.0:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.2.0.tgz#17ea7e40d7c8640ff54a694c889c26f31704effe"
+  integrity sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==
 
 agent-base@5:
   version "5.1.1"