fix: update istanbul-lib-source-maps to 1.0.2 (#411)

Author: mourner

package.json

@@ -85,7 +85,7 @@
     "istanbul-lib-hook": "^1.0.0-alpha.4",
     "istanbul-lib-instrument": "^1.1.3",
     "istanbul-lib-report": "^1.0.0-alpha.3",
-    "istanbul-lib-source-maps": "^1.0.1",
+    "istanbul-lib-source-maps": "^1.0.2",
     "istanbul-reports": "^1.0.0-alpha.8",
     "md5-hex": "^1.2.0",
     "micromatch": "^2.3.11",