build: downgrade to less@3.9.0

With less@3.10+, our less files won't compile using less-loader.

Known issue: less/less.js#3414

packages/manager/tools/component-rollup-config/package.json

@@ -41,7 +41,7 @@
     "babel-plugin-angularjs-annotate": "^0.10.0",
     "camelcase": "^5.0.0",
     "estree-walker": "^0.6.0",
-    "less": "^3.10.1",
+    "less": "~3.9.0",
     "less-plugin-remcalc": "^0.1.0",
     "lodash": "^4.17.15",
     "magic-string": "^0.25.3",

packages/manager/tools/webpack-config/package.json

@@ -50,7 +50,7 @@
     "file-loader": "^2.0.0",
     "html-webpack-plugin": "^3.2.0",
     "http-proxy-middleware": "^0.19.1",
-    "less": "^3.10.1",
+    "less": "~3.9.0",
     "less-loader": "^4.1.0",
     "less-plugin-remcalc": "^0.1.0",
     "loader-utils": "^1.2.3",

yarn.lock

@@ -7907,23 +7907,7 @@ less-plugin-remcalc@^0.1.0:
   resolved "https://registry.yarnpkg.com/less-plugin-remcalc/-/less-plugin-remcalc-0.1.0.tgz#34bce158cd24d2a14efa8984e01b2b9d0420d4cc"
   integrity sha512-Nws5vHVO5QwXlIURF9ncZwTZtw91CH57F1yMm98c52RwWRaqZdmntcyxG+LuBLqM2Qfh2GWt0v0BrVrkzj2Cqg==
 
-less@^3.10.1:
-  version "3.10.1"
-  resolved "https://registry.yarnpkg.com/less/-/less-3.10.1.tgz#a1c97e3436acdfd1757916333b9906f3af7d559e"
-  integrity sha512-xlPx6vt5nAm1DGDnuv06SNQba4WnMKY5vZkgCrnyKXkDbs09kl9cc2nSS7OMufLT60IWsxUSnwr1Rkh4rkMFcg==
-  dependencies:
-    clone "^2.1.2"
-  optionalDependencies:
-    errno "^0.1.1"
-    graceful-fs "^4.1.2"
-    image-size "~0.5.0"
-    mime "^1.4.1"
-    mkdirp "^0.5.0"
-    promise "^7.1.1"
-    request "^2.83.0"
-    source-map "~0.6.0"
-
-less@^3.9.0:
+less@^3.9.0, less@~3.9.0:
   version "3.9.0"
   resolved "https://registry.yarnpkg.com/less/-/less-3.9.0.tgz#b7511c43f37cf57dc87dffd9883ec121289b1474"
   integrity sha512-31CmtPEZraNUtuUREYjSqRkeETFdyEHSEPAGq4erDlUXtda7pzNmctdljdIagSb589d/qXGWiiP31R5JVf+v0w==