Bump pygments from 2.2.0 to 2.7.4 in /requirements

requirements/local.txt

@@ -4,21 +4,44 @@
 #
 #    pip-compile --output-file local.txt local.in
 #
-click==6.7                # via pip-tools
-decorator==4.2.1          # via ipython, traitlets
-first==2.0.1              # via pip-tools
+click==6.7
+    # via pip-tools
+decorator==4.2.1
+    # via
+    #   ipython
+    #   traitlets
+first==2.0.1
+    # via pip-tools
 ipdb==0.11
-ipython-genutils==0.2.0   # via traitlets
-ipython==6.2.1            # via ipdb
-jedi==0.11.1              # via ipython
-parso==0.1.1              # via jedi
-pexpect==4.4.0            # via ipython
-pickleshare==0.7.4        # via ipython
+    # via -r local.in
+ipython-genutils==0.2.0
+    # via traitlets
+ipython==6.2.1
+    # via ipdb
+jedi==0.11.1
+    # via ipython
+parso==0.1.1
+    # via jedi
+pexpect==4.4.0
+    # via ipython
+pickleshare==0.7.4
+    # via ipython
 pip-tools==1.11.0
-prompt-toolkit==1.0.15    # via ipython
-ptyprocess==0.5.2         # via pexpect
-pygments==2.2.0           # via ipython
-simplegeneric==0.8.1      # via ipython
-six==1.11.0               # via pip-tools, prompt-toolkit, traitlets
-traitlets==4.3.2          # via ipython
-wcwidth==0.1.7            # via prompt-toolkit
+    # via -r local.in
+prompt-toolkit==1.0.15
+    # via ipython
+ptyprocess==0.5.2
+    # via pexpect
+pygments==2.7.4
+    # via ipython
+simplegeneric==0.8.1
+    # via ipython
+six==1.11.0
+    # via
+    #   pip-tools
+    #   prompt-toolkit
+    #   traitlets
+traitlets==4.3.2
+    # via ipython
+wcwidth==0.1.7
+    # via prompt-toolkit