fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-AXIOS-6124857

package.json

@@ -34,7 +34,7 @@
     "heroku-postbuild": "yarn build"
   },
   "dependencies": {
-    "@nestjs/common": "~7.6.18",
+    "@nestjs/common": "~9.0.0",
     "@nestjs/config": "~0.6.3",
     "@nestjs/core": "~7.6.18",
     "@nestjs/jwt": "~7.2.0",

yarn.lock

@@ -750,14 +750,13 @@
     webpack "5.28.0"
     webpack-node-externals "2.5.2"
 
-"@nestjs/common@~7.6.18":
-  version "7.6.18"
-  resolved "https://registry.yarnpkg.com/@nestjs/common/-/common-7.6.18.tgz#d89e6d248985eec13af60507a8725cb2142d660a"
-  integrity sha512-BUJQHNhWzwWOkS4Ryndzd4HTeRObcAWV2Fh+ermyo3q3xYQQzNoEWclJVL/wZec8AONELwIJ+PSpWI53VP0leg==
+"@nestjs/common@~9.0.0":
+  version "9.0.11"
+  resolved "https://registry.yarnpkg.com/@nestjs/common/-/common-9.0.11.tgz#5747cfbb5d94d909bc2894bf2a5bec83fca809c5"
+  integrity sha512-oYLIcOal3QOwcqt6goXovRNg8ZkalyOMjH0oYYzfJLrait6P7c6nAeWHu4qFDThY7GoZHEanLgji1qlqVEW09g==
   dependencies:
-    axios "0.21.1"
     iterare "1.2.1"
-    tslib "2.2.0"
+    tslib "2.4.0"
     uuid "8.3.2"
 
 "@nestjs/config@~0.6.3":
@@ -1785,7 +1784,7 @@ avvio@^7.1.2:
     fastq "^1.6.1"
     queue-microtask "^1.1.2"
 
-axios@0.21.1, axios@~0.21.1:
+axios@~0.21.1:
   version "0.21.1"
   resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.1.tgz#22563481962f4d6bde9a76d516ef0e5d3c09b2b8"
   integrity sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==
@@ -7069,6 +7068,11 @@ tslib@2.3.1:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.3.1.tgz#e8a335add5ceae51aa261d32a490158ef042ef01"
   integrity sha512-77EbyPPpMz+FRFRuAFlWMtmgUWGe9UOG2Z25NqCwiIjRhOf5iKGuzSe5P2w1laq+FkRy4p+PCuVkJSGkzTEKVw==
 
+tslib@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.4.0.tgz#7cecaa7f073ce680a05847aa77be941098f36dc3"
+  integrity sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ==
+
 tslib@^1.8.1, tslib@^1.9.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"