build(deps): bump elliptic from 6.5.3 to 6.5.4 in /examples/hello-world

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](indutny/elliptic@v6.5.3...v6.5.4)

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

Author: dependabot[bot]

examples/hello-world/yarn.lock

@@ -977,10 +977,10 @@
   optionalDependencies:
     prettier "^1.18.2"
 
-"@vue/composition-api@^1.0.0-beta.22":
-  version "1.0.0-rc.2"
-  resolved "https://registry.yarnpkg.com/@vue/composition-api/-/composition-api-1.0.0-rc.2.tgz#9d90e507cf71634aad51ab878b141c2a4739d523"
-  integrity sha512-R4XEvT+qXiT/lnsLzqhjkR/L/ALuNeeQPZqredpLduGKwZtmt2l5I3kT1W+c/157hrY732eFlsPUGz/q9vFaYg==
+"@vue/composition-api@^1.0.0-rc.3":
+  version "1.0.0-rc.3"
+  resolved "https://registry.yarnpkg.com/@vue/composition-api/-/composition-api-1.0.0-rc.3.tgz#5174632fdda888f4f04bbaa5263cf01e34ba3fc2"
+  integrity sha512-/N/yCgIeFwAdsChML1RAke7YT5v/LYnPOyrz2zU+fE6xx2MpZfWn+DD2wCf3Vre659AvuXA8zzKLlRaFzW75XQ==
   dependencies:
     tslib "^2.1.0"
 
@@ -1242,10 +1242,10 @@ bluebird@^3.1.1:
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.7.2.tgz#9f229c15be272454ffa973ace0dbee79a1b0c36f"
   integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.4.0:
-  version "4.11.9"
-  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.9.tgz#26d556829458f9d1e81fc48952493d0ba3507828"
-  integrity sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.9:
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
 bn.js@^5.1.1:
   version "5.1.3"
@@ -1291,7 +1291,7 @@ brfs@^1.2.0:
     static-module "^2.2.0"
     through2 "^2.0.0"
 
-brorand@^1.0.1:
+brorand@^1.0.1, brorand@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
@@ -2117,17 +2117,17 @@ electron-to-chromium@^1.3.571:
   integrity sha512-z4gU6dA1CbBJsAErW5swTGAaU2TBzc2mPAonJb00zqW1rOraDo2zfBMDRvaz9cVic+0JEZiYbHWPw/fTaZlG2Q==
 
 elliptic@^6.5.3:
-  version "6.5.3"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
-  integrity sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz#da37cebd31e79a1367e941b592ed1fbebd58abbb"
+  integrity sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==
   dependencies:
-    bn.js "^4.4.0"
-    brorand "^1.0.1"
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
     hash.js "^1.0.0"
-    hmac-drbg "^1.0.0"
-    inherits "^2.0.1"
-    minimalistic-assert "^1.0.0"
-    minimalistic-crypto-utils "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
 
 encodeurl@~1.0.2:
   version "1.0.2"
@@ -2403,7 +2403,7 @@ fill-range@^4.0.0:
     "@fluent/sequence" "^0.6.0"
     cached-iterable "^0.3.0"
     tslib "^2.0.3"
-    vue-demi "^0.6.0"
+    vue-demi "^0.7.1"
 
 for-in@^1.0.2:
   version "1.0.2"
@@ -2624,7 +2624,7 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-hmac-drbg@^1.0.0:
+hmac-drbg@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
   integrity sha1-0nRXAQJabHdabFRXk+1QL8DGSaE=
@@ -3322,7 +3322,7 @@ minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
   resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
   integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
 
-minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
+minimalistic-crypto-utils@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
   integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=
@@ -5191,10 +5191,10 @@ vm-browserify@^1.0.1:
   resolved "https://registry.yarnpkg.com/vm-browserify/-/vm-browserify-1.1.2.tgz#78641c488b8e6ca91a75f511e7a3b32a86e5dda0"
   integrity sha512-2ham8XPWTONajOR0ohOKOHXkm3+gaBmGut3SRuu75xLd/RRaY6vqgh8NBYYk7+RW3u5AtzPQZG8F10LHkl0lAQ==
 
-vue-demi@^0.6.0:
-  version "0.6.0"
-  resolved "https://registry.yarnpkg.com/vue-demi/-/vue-demi-0.6.0.tgz#e314282f704cb449119b9fd002cbbc0e39f591fe"
-  integrity sha512-8GEJa0mHJpYJeGeq5fD1pJct2kfdl30PHfmL1NaJ97mgKPyKojlIRt/3inGBK4Y0ylCI6T5vOo3chwpqDOq/Hw==
+vue-demi@^0.7.1:
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/vue-demi/-/vue-demi-0.7.1.tgz#e7cf3e70e4c69bc192f4530c2665ce8b289f5dc4"
+  integrity sha512-cJ3QnpcbIqdpeV3NnNgSDwneCJifvHct+6JNvfYn/49geK/uv5VJicZDvyg20guNhz+DZmUHBHyRQTJ32lSC2g==
 
 vue-hot-reload-api@^2.3.3:
   version "2.3.4"