diff --git a/.travis.yml b/.travis.yml
index 9105021..ad116b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,8 +9,8 @@ cache:
     - $HOME/.composer/cache
 
 before_install:
-  - nvm install 8
-  - nvm use 8
+  - nvm install '12.4.0'
+  - nvm use '12.4.0'
 
 install:
   - npm ci
diff --git a/package-lock.json b/package-lock.json
index f53b4f3..0587896 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1685,8 +1685,16 @@
       "requires": {
         "nice-try": "^1.0.4",
         "path-key": "^2.0.1",
+        "semver": "^5.5.0",
         "shebang-command": "^1.2.0",
         "which": "^1.2.9"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
+        }
       }
     },
     "css-select": {
@@ -2071,6 +2079,7 @@
         "progress": "^2.0.0",
         "regexpp": "^1.0.1",
         "require-uncached": "^1.0.3",
+        "semver": "^5.3.0",
         "strip-ansi": "^4.0.0",
         "strip-json-comments": "~2.0.1",
         "table": "4.0.2",
@@ -2102,6 +2111,12 @@
           "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
           "integrity": "sha512-Pgs951kaMm5GXP7MOvxERINe3gsaVjUWFm+UZPSq9xYriQAksyhg0csnS0KXSNRD5NmNdapXEpjxG49+AKh/ug==",
           "dev": true
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
         }
       }
     },
@@ -4838,7 +4853,16 @@
       "requires": {
         "hosted-git-info": "^2.1.4",
         "resolve": "^1.10.0",
+        "semver": "2 || 3 || 4 || 5",
         "validate-npm-package-license": "^3.0.1"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        }
       }
     },
     "normalize-path": {
@@ -8676,7 +8700,18 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/parse-semver/-/parse-semver-1.1.1.tgz",
       "integrity": "sha1-mkr9bfBj3Egm+T+6SpnPIj9mbLg=",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "semver": "^5.1.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        }
+      }
     },
     "parse5": {
       "version": "3.0.3",
@@ -9383,6 +9418,7 @@
         "p-reduce": "^1.0.0",
         "read-pkg-up": "^4.0.0",
         "resolve-from": "^4.0.0",
+        "semver": "^5.4.1",
         "signale": "^1.2.1",
         "yargs": "^12.0.0"
       },
@@ -9439,6 +9475,12 @@
             "find-up": "^3.0.0",
             "read-pkg": "^3.0.0"
           }
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
         }
       }
     },
@@ -9460,6 +9502,7 @@
         "fs-extra": "^5.0.0",
         "node-fetch": "^1.7.3",
         "read-pkg-up": "^3.0.0",
+        "semver": "^5.4.1",
         "vsce": "^1.33.2"
       },
       "dependencies": {
@@ -9515,6 +9558,12 @@
             "encoding": "^0.1.11",
             "is-stream": "^1.0.1"
           }
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
         }
       }
     },
@@ -10047,8 +10096,17 @@
         "js-yaml": "^3.7.0",
         "minimatch": "^3.0.4",
         "resolve": "^1.3.2",
+        "semver": "^5.3.0",
         "tslib": "^1.8.0",
         "tsutils": "^2.27.2"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        }
       }
     },
     "tslint-config-prettier": {
@@ -10411,6 +10469,7 @@
         "osenv": "^0.1.3",
         "parse-semver": "^1.1.1",
         "read": "^1.0.7",
+        "semver": "^5.1.0",
         "tmp": "0.0.29",
         "typed-rest-client": "1.2.0",
         "url-join": "^1.1.0",
@@ -10435,6 +10494,12 @@
           "integrity": "sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==",
           "dev": true
         },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        },
         "tmp": {
           "version": "0.0.29",
           "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.29.tgz",
@@ -10468,9 +10533,18 @@
         "gulp-vinyl-zip": "^2.1.0",
         "mocha": "^4.0.1",
         "request": "^2.83.0",
+        "semver": "^5.4.1",
         "source-map-support": "^0.5.0",
         "url-parse": "^1.4.3",
         "vinyl-source-stream": "^1.1.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        }
       }
     },
     "vscode-jsonrpc": {
@@ -10483,7 +10557,15 @@
       "resolved": "https://registry.npmjs.org/vscode-languageclient/-/vscode-languageclient-5.1.1.tgz",
       "integrity": "sha512-jMxshi+BPRQFNG8GB00dJv7ldqMda0be26laYYll/udtJuHbog6RqK10GSxHWDN0PgY0b0m5fePyTk3bq8a0TA==",
       "requires": {
+        "semver": "^5.5.0",
         "vscode-languageserver-protocol": "3.13.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
+        }
       }
     },
     "vscode-languageserver-protocol": {