upgrade to libdparse 0.19.0

dub.json

@@ -6,7 +6,7 @@
 	"targetPath": "build",
 	"targetType": "library",
 	"dependencies": {
-		"libdparse": ">=0.14.0 <0.19.0",
+		"libdparse": ">=0.19.0 <0.20.0",
 		"emsi_containers": "~>0.8.0",
 		"stdx-allocator": "~>2.77.5"
 	}

src/dsymbol/conversion/package.d

@@ -148,7 +148,9 @@ class SimpleParser : Parser
 	{
 		// Unlike many of the other parsing functions, it is valid and expected
 		// for this one to return `null` on valid code. Returning `null` in
-		// this function means that we are looking at a SpecifiedFunctionBody.
+		// this function means that we are looking at a SpecifiedFunctionBody
+		// or ShortenedFunctionBody.
+		//
 		// The super-class will handle re-trying with the correct parsing
 		// function.
 
@@ -177,6 +179,24 @@ class SimpleParser : Parser
 		return allocator.make!SpecifiedFunctionBody;
 	}
 
+	override ShortenedFunctionBody parseShortenedFunctionBody()
+	{
+		skipContracts();
+		if (currentIs(tok!"=>"))
+		{
+			while (!currentIs(tok!";") && moreTokens)
+			{
+				if (currentIs(tok!"{")) // potential function literal
+					skipBraces();
+				else
+					advance();
+			}
+			if (moreTokens)
+				advance();
+		}
+		return allocator.make!ShortenedFunctionBody;
+	}
+
 	/**
 	 * Skip contracts, and return `true` if the type of contract used requires
 	 * that the next token is `do`.