Update lxml

Pipfile

@@ -33,7 +33,7 @@ envparse = "~=0.2.0"
 gunicorn = "~=20.0.4"
 icalendar = "~=4.0.7"
 idna = "~=2.10"
-lxml = "~=4.6.3"
+lxml = "~=4.7.1"
 Markdown = "~=3.3.3"
 msgpack = "~=1.0.2"
 pep517 = "~=0.9.1"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "db33559aff5586d7f78c1aa6a10e2f0bb05167c598ad995ec549f65f4710ae0a"
+            "sha256": "4ab82dc758c1acae73e1e7996eaf1974b9779ffc5d6030574071d9b00afe63ee"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -1322,11 +1322,11 @@
         },
         "charset-normalizer": {
             "hashes": [
-                "sha256:1eecaa09422db5be9e29d7fc65664e6c33bd06f9ced7838578ba40d58bdf3721",
-                "sha256:b0b883e8e874edfdece9c28f314e3dd5badf067342e42fb162203335ae61aa2c"
+                "sha256:876d180e9d7432c5d1dfd4c5d26b72f099d503e8fcc0feb7532c9289be60fcbd",
+                "sha256:cb957888737fc0bbcd78e3df769addb41fd1ff8cf950dc9e7ad7793f1bf44455"
             ],
             "markers": "python_version >= '3'",
-            "version": "==2.0.9"
+            "version": "==2.0.10"
         },
         "coverage": {
             "hashes": [