Bump lxml from 4.5.2 to 4.6.2 (#396)

Bumps [lxml](https://github.com/lxml/lxml) from 4.5.2 to 4.6.2.
- [Release notes](https://github.com/lxml/lxml/releases)
- [Changelog](https://github.com/lxml/lxml/blob/master/CHANGES.txt)
- [Commits](lxml/lxml@lxml-4.5.2...lxml-4.6.2)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -4,36 +4,83 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.in
 #
-appdirs==1.4.4            # via fs
-attrs==20.2.0             # via cattrs, fontmake, statmake, ufolib2
-booleanoperations==0.9.0  # via fontmake, ufo2ft
-brotli==1.0.9             # via fonttools
-cattrs==1.0.0             # via statmake
-cffsubr==0.2.7            # via ufo2ft
-compreffor==0.5.0         # via ufo2ft
-cu2qu==1.6.7              # via fontmake, ufo2ft
-fontmake==2.2.1           # via -r requirements.in
-fontmath==0.6.0           # via fontmake
-fonttools[lxml,ufo,unicode,woff]==4.15.0  # via -r requirements.in, booleanoperations, cffsubr, compreffor, cu2qu, fontmake, fontmath, glyphslib, psautohint, statmake, ufo2ft, ufolib2, vttlib, vttmisc
-fs==2.4.11                # via fonttools
-glyphslib==5.2.0          # via fontmake
-importlib-metadata==1.7.0  # via statmake
-lxml==4.5.2               # via fonttools
-psautohint==2.1.0         # via -r requirements.in
-pyclipper==1.2.0          # via booleanoperations
-pyparsing==2.4.7          # via vttlib
-pytz==2020.1              # via fs
-six==1.15.0               # via fs
-skia-pathops==0.4.1       # via -r requirements.in
-statmake==0.3.0           # via -r requirements.in
-typing-extensions==3.7.4.3  # via ufolib2
-ufo2ft[cffsubr]==2.16.0   # via fontmake
-ufolib2==0.8.0            # via fontmake, glyphslib, vttlib
-unicodedata2==13.0.0.post2  # via fonttools
-vttlib==0.9.1.post2       # via -r requirements.in
-vttmisc==0.0.2            # via -r requirements.in
-zipp==3.2.0               # via importlib-metadata
-zopfli==0.1.7             # via fonttools
+appdirs==1.4.4
+    # via fs
+attrs==20.2.0
+    # via
+    #   cattrs
+    #   fontmake
+    #   statmake
+    #   ufolib2
+booleanoperations==0.9.0
+    # via
+    #   fontmake
+    #   ufo2ft
+brotli==1.0.9
+    # via fonttools
+cattrs==1.0.0
+    # via statmake
+cffsubr==0.2.7
+    # via ufo2ft
+compreffor==0.5.0
+    # via ufo2ft
+cu2qu==1.6.7
+    # via
+    #   fontmake
+    #   ufo2ft
+fontmake==2.2.1
+    # via -r requirements.in
+fontmath==0.6.0
+    # via fontmake
+fonttools[lxml,ufo,unicode,woff]==4.15.0
+    # via
+    #   -r requirements.in
+    #   booleanoperations
+    #   cffsubr
+    #   compreffor
+    #   cu2qu
+    #   fontmake
+    #   fontmath
+    #   glyphslib
+    #   psautohint
+    #   statmake
+    #   ufo2ft
+    #   ufolib2
+    #   vttlib
+    #   vttmisc
+fs==2.4.11
+    # via fonttools
+glyphslib==5.2.0
+    # via fontmake
+lxml==4.6.2
+    # via fonttools
+psautohint==2.1.0
+    # via -r requirements.in
+pyclipper==1.2.0
+    # via booleanoperations
+pyparsing==2.4.7
+    # via vttlib
+pytz==2020.1
+    # via fs
+six==1.15.0
+    # via fs
+skia-pathops==0.4.1
+    # via -r requirements.in
+statmake==0.3.0
+    # via -r requirements.in
+ufo2ft[cffsubr]==2.16.0
+    # via fontmake
+ufolib2==0.8.0
+    # via
+    #   fontmake
+    #   glyphslib
+    #   vttlib
+vttlib==0.9.1.post2
+    # via -r requirements.in
+vttmisc==0.0.2
+    # via -r requirements.in
+zopfli==0.1.7
+    # via fonttools
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools