build(deps): bump acorn from 5.7.3 to 5.7.4

Bumps [acorn](https://github.com/acornjs/acorn) from 5.7.3 to 5.7.4.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@5.7.3...5.7.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -2216,6 +2216,17 @@
     raf "^3.4.1"
     whatwg-fetch "^2.0.4"
 
+"@tarojs/taro-h5@^2.2.2":
+  version "2.2.7"
+  resolved "https://registry.yarnpkg.com/@tarojs/taro-h5/-/taro-h5-2.2.7.tgz#24f80a10129e0211fa81f085668eefc9c598b9c4"
+  integrity sha512-CXdoeH06skqwpMB4cQyqfL4zQaII6YcFr9pbL5vgLrFYegFFhtJxiRzOJbdL2wkuKvIhElBjPPV7dUspXRmQxQ==
+  dependencies:
+    base64-js "^1.3.0"
+    jsonp-retry "^1.0.3"
+    mobile-detect "^1.4.2"
+    raf "^3.4.1"
+    whatwg-fetch "^2.0.4"
+
 "@tarojs/[email protected]":
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/@tarojs/taro-swan/-/taro-swan-2.2.2.tgz#8f5539e88aeac32bbf53a4a521d2f306e824a42c"
@@ -3012,9 +3023,9 @@ acorn-walk@^6.0.1:
   integrity sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
-  integrity sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.1, acorn@^6.0.7, acorn@^6.2.1:
   version "6.4.0"