Entering an escaped quote in a tag name causes incorrect JSON to be generated

[bognolo]

Note that the issue is only in the JSON generation, the data is correctly escaped in the database and the standard output including summary

$ timew start "This is a very long tag indeed\";01"
Tracking "This is a very long tag indeed\";01"
  Started 2018-05-08T11:45:22
  Current                  22
  Total               0:00:00

$ timew 
Tracking "This is a very long tag indeed\";01"
  Started 2018-05-08T11:45:22
  Current               47:19
  Total               0:01:57

$ timew summary :week
Wk  Date       Day Tags                                  Start      End    Time   Total
W19 2018-05-07 Mon task1                              15:24:32 15:30:00 0:05:28
                   task2                              15:30:21 15:39:38 0:09:17 0:14:45
W19 2018-05-08 Tue test1                              10:16:04 11:05:19 0:49:15
                   test1                              11:05:29 11:30:17 0:24:48
                   task1                              11:30:17 11:42:37 0:12:20
                   task1                              11:43:14 11:44:58 0:01:44
                   This is a very long tag indeed";01 11:45:22 11:48:17 0:02:55
                   This is a very long tag indeed';01 11:48:30        - 0:08:01 1:39:03
                                                                                       
                                                                                1:53:48

$ timew get dom.active.json
{"start":"20180508T014522Z","tags":["This is a very long tag indeed";01"]}