diff --git a/package-lock.json b/package-lock.json
index 5cc5fa3..99add13 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -306,6 +306,68 @@
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       "dev": true
     },
+    "@rollup/pluginutils": {
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-3.0.9.tgz",
+      "integrity": "sha512-TLZavlfPAZYI7v33wQh4mTP6zojne14yok3DNSLcjoG/Hirxfkonn6icP5rrNWRn8nZsirJBFFpijVOJzkUHDg==",
+      "dev": true,
+      "requires": {
+        "@types/estree": "0.0.39",
+        "estree-walker": "^1.0.1",
+        "micromatch": "^4.0.2"
+      },
+      "dependencies": {
+        "braces": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+          "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
+          "dev": true,
+          "requires": {
+            "fill-range": "^7.0.1"
+          }
+        },
+        "estree-walker": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-1.0.1.tgz",
+          "integrity": "sha512-1fMXF3YP4pZZVozF8j/ZLfvnR8NSIljt56UhbZ5PeeDmmGHpgpdwQt7ITlGvYaQukCvuBRMLEiKiYC+oeIg4cg==",
+          "dev": true
+        },
+        "fill-range": {
+          "version": "7.0.1",
+          "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
+          "integrity": "sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==",
+          "dev": true,
+          "requires": {
+            "to-regex-range": "^5.0.1"
+          }
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+        "is-number": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
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+          "dev": true
+        },
+        "micromatch": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.2.tgz",
+          "integrity": "sha512-y7FpHSbMUMoyPbYUSzO6PaZ6FyRnQOpHuKwbo1G+Knck95XVU4QAiKdGEnj5wwoS7PlOgthX/09u5iFJ+aYf5Q==",
+          "dev": true,
+          "requires": {
+            "braces": "^3.0.1",
+            "picomatch": "^2.0.5"
+          }
+        },
+        "to-regex-range": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+          "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+          "dev": true,
+          "requires": {
+            "is-number": "^7.0.0"
+          }
+        }
+      }
+    },
     "@types/estree": {
       "version": "0.0.39",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-0.0.39.tgz",
@@ -10909,6 +10971,12 @@
       "integrity": "sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=",
       "dev": true
     },
+    "picomatch": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.2.2.tgz",
+      "integrity": "sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg==",
+      "dev": true
+    },
     "pify": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -12427,13 +12495,25 @@
       }
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     "rollup-plugin-sourcemaps": {
-      "version": "0.4.2",
-      "resolved": "https://registry.npmjs.org/rollup-plugin-sourcemaps/-/rollup-plugin-sourcemaps-0.4.2.tgz",
-      "integrity": "sha1-YhJaqUCHqt97g+9N+vYptHMTXoc=",
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-sourcemaps/-/rollup-plugin-sourcemaps-0.6.0.tgz",
+      "integrity": "sha512-w8VaINTIqa2pbQEgDpkbPYdTc4Y2btgdJg4Tqwr8mtpdRgvEXprNWsLoCJphe4NRFKqeMedBjZ4m2FbrEtA3dQ==",
       "dev": true,
       "requires": {
-        "rollup-pluginutils": "^2.0.1",
-        "source-map-resolve": "^0.5.0"
+        "@rollup/pluginutils": "^3.0.9",
+        "source-map-resolve": "^0.6.0"
+      },
+      "dependencies": {
+        "source-map-resolve": {
+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.6.0.tgz",
+          "integrity": "sha512-KXBr9d/fO/bWo97NXsPIAW1bFSBOuCnjbNTBMO7N59hsv5i9yzRDfcYwwt0l04+VqnKC+EwzvJZIP/qkuMgR/w==",
+          "dev": true,
+          "requires": {
+            "atob": "^2.1.2",
+            "decode-uri-component": "^0.2.0"
+          }
+        }
       }
     },
     "rollup-plugin-uglify": {
diff --git a/package.json b/package.json
index 1d38f59..c440e85 100644
--- a/package.json
+++ b/package.json
@@ -92,7 +92,7 @@
     "rollup": "^1.15.3",
     "rollup-plugin-commonjs": "^9.2.0",
     "rollup-plugin-node-resolve": "^4.2.4",
-    "rollup-plugin-sourcemaps": "^0.4.2",
+    "rollup-plugin-sourcemaps": "^0.6.0",
     "rollup-plugin-uglify": "3.0.0",
     "run-sequence": "^2.2.1",
     "rxjs": "^6.5.2",