diff --git a/package.json b/package.json
index f881b332..e1c0d20e 100644
--- a/package.json
+++ b/package.json
@@ -23,10 +23,10 @@
     "monaco-languages": "1.8.0",
     "monaco-plugin-helpers": "^1.0.2",
     "requirejs": "^2.3.6",
-    "typescript": "3.3.3333",
-    "uglify-js": "3.4.9",
+    "typescript": "3.7.3",
+    "uglify-js": "3.7.2",
     "vscode-css-languageservice": "4.0.3-next.25",
-    "vscode-languageserver-types": "3.15.0-next.6",
-    "vscode-languageserver-textdocument": "^1.0.0-next.4"
+    "vscode-languageserver-types": "3.15.0-next.9",
+    "vscode-languageserver-textdocument": "^1.0.0-next.5"
   }
 }
diff --git a/src/tsconfig.esm.json b/src/tsconfig.esm.json
index a84f69ca..33cf660c 100644
--- a/src/tsconfig.esm.json
+++ b/src/tsconfig.esm.json
@@ -8,7 +8,8 @@
       "dom",
       "es5",
       "es2015.collection",
-      "es2015.promise"
+      "es2015.promise",
+      "es2015.iterable"
     ]
   }
 }
\ No newline at end of file
diff --git a/src/tsconfig.json b/src/tsconfig.json
index 294f4a3b..c1f28c19 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -8,7 +8,8 @@
       "dom",
       "es5",
       "es2015.collection",
-      "es2015.promise"
+      "es2015.promise",
+      "es2015.iterable"
     ]
   }
 }
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 00000000..8c6b7625
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,83 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
+monaco-editor-core@0.18.1:
+  version "0.18.1"
+  resolved "https://registry.yarnpkg.com/monaco-editor-core/-/monaco-editor-core-0.18.1.tgz#6aa739a4a3b7444183876db83bac5c55e86c58e6"
+  integrity sha512-euzXzmwjZFG0oAPGjICMwINcZBzQDyfGDYlAR5YNMBJZO9Bmkqq1xpTTze/qQ0KKbVmawFXiwgUbg7WVgebP9Q==
+
+monaco-languages@1.8.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/monaco-languages/-/monaco-languages-1.8.0.tgz#aeacf40b0f8d0130c4b43c6c143b55f86e6b909d"
+  integrity sha512-vC/lqNgSslQT3vSlNOpyT34ELK0eoNbA/rHUvTUjQemIiR1GpRMKhuwB21BqzWk+0MjZuJydGSCQMCebBge7jg==
+
+monaco-plugin-helpers@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/monaco-plugin-helpers/-/monaco-plugin-helpers-1.0.2.tgz#ee1af42503fe4669f3a8731112b661032e41c8a9"
+  integrity sha512-7kUx8dtd5qVNVgUARBRhnM8oftPglYwlINfigC4yGUiuzqtIN22u1tly8umiOCIPR0eFiBLjt6aN23oZh2QJgg==
+  dependencies:
+    typescript "^2.7.2"
+
+requirejs@^2.3.6:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/requirejs/-/requirejs-2.3.6.tgz#e5093d9601c2829251258c0b9445d4d19fa9e7c9"
+  integrity sha512-ipEzlWQe6RK3jkzikgCupiTbTvm4S0/CAU5GlgptkN5SO6F3u0UD0K18wy6ErDqiCyP4J4YYe1HuAShvsxePLg==
+
+source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
+
+typescript@3.7.3:
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.7.3.tgz#b36840668a16458a7025b9eabfad11b66ab85c69"
+  integrity sha512-Mcr/Qk7hXqFBXMN7p7Lusj1ktCBydylfQM/FZCk5glCNQJrCUKPkMHdo9R0MTFWsC/4kPFvDS0fDPvukfCkFsw==
+
+typescript@^2.7.2:
+  version "2.9.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+  integrity sha512-Gr4p6nFNaoufRIY4NMdpQRNmgxVIGMs4Fcu/ujdYk3nAZqk7supzBE9idmvfZIlH/Cuj//dvi+019qEue9lV0w==
+
+uglify-js@3.7.2:
+  version "3.7.2"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.2.tgz#cb1a601e67536e9ed094a92dd1e333459643d3f9"
+  integrity sha512-uhRwZcANNWVLrxLfNFEdltoPNhECUR3lc+UdJoG9CBpMcSnKyWA94tc3eAujB1GcMY5Uwq8ZMp4qWpxWYDQmaA==
+  dependencies:
+    commander "~2.20.3"
+    source-map "~0.6.1"
+
+vscode-css-languageservice@4.0.3-next.25:
+  version "4.0.3-next.25"
+  resolved "https://registry.yarnpkg.com/vscode-css-languageservice/-/vscode-css-languageservice-4.0.3-next.25.tgz#c200039f33c08a11e6848ae1165ef302e0ee194e"
+  integrity sha512-c6qoSiYUJUDYizqQRZw5tb7n3IjCgGeFg74aWV0IsihrLWKPmMwDdRDzIDohWwlOf5myrEvuHmbPo7wTaspG+w==
+  dependencies:
+    vscode-languageserver-textdocument "^1.0.0-next.4"
+    vscode-languageserver-types "^3.15.0-next.6"
+    vscode-nls "^4.1.1"
+    vscode-uri "^2.1.1"
+
+vscode-languageserver-textdocument@^1.0.0-next.4, vscode-languageserver-textdocument@^1.0.0-next.5:
+  version "1.0.0-next.5"
+  resolved "https://registry.yarnpkg.com/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.0-next.5.tgz#dbb7a45dd973a19261a7c57ab9a439c40f3799ee"
+  integrity sha512-1jp/zAidN/bF/sqPimhBX1orH5G4rzRw63k75TesukJDuxm8yW79ECStWbDSy41BHGOwSGN4M69QFvhancSr5A==
+
+vscode-languageserver-types@3.15.0-next.9, vscode-languageserver-types@^3.15.0-next.6:
+  version "3.15.0-next.9"
+  resolved "https://registry.yarnpkg.com/vscode-languageserver-types/-/vscode-languageserver-types-3.15.0-next.9.tgz#957a9d1d5998a02edf62298fb7e37d9efcc6c157"
+  integrity sha512-Rl/8qJ6932nrHCdPn+9y0x08uLVQaSLRG+U4JzhyKpWU4eJbVaDRoAcz1Llj7CErJGbPr6kdBvShPy5fRfR+Uw==
+
+vscode-nls@^4.1.1:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/vscode-nls/-/vscode-nls-4.1.1.tgz#f9916b64e4947b20322defb1e676a495861f133c"
+  integrity sha512-4R+2UoUUU/LdnMnFjePxfLqNhBS8lrAFyX7pjb2ud/lqDkrUavFUTcG7wR0HBZFakae0Q6KLBFjMS6W93F403A==
+
+vscode-uri@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/vscode-uri/-/vscode-uri-2.1.1.tgz#5aa1803391b6ebdd17d047f51365cf62c38f6e90"
+  integrity sha512-eY9jmGoEnVf8VE8xr5znSah7Qt1P/xsCdErz+g8HYZtJ7bZqKH5E3d+6oVNm1AC/c6IHUDokbmVXKOi4qPAC9A==