diff --git a/requirements-dev.txt b/requirements-dev.txt
index a849138..e29dc1f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -15,40 +15,47 @@ incremental==17.5.0 \
 jinja2==2.11.2 \
     --hash=sha256:f0a4641d3cf955324a89c04f3d94663aa4d638abe8f733ecd3582848e1c37035 \
     --hash=sha256:89aab215427ef59c34ad58735269eb58b1a5808103067f7bb9d5836c651b3bb0
-markupsafe==1.1.1 \
-    --hash=sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161 \
-    --hash=sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7 \
-    --hash=sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183 \
-    --hash=sha256:b2051432115498d3562c084a49bba65d97cf251f5a331c64a12ee7e04dacc51b \
-    --hash=sha256:98c7086708b163d425c67c7a91bad6e466bb99d797aa64f965e9d25c12111a5e \
-    --hash=sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f \
-    --hash=sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1 \
-    --hash=sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5 \
-    --hash=sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1 \
-    --hash=sha256:88e5fcfb52ee7b911e8bb6d6aa2fd21fbecc674eadd44118a9cc3863f938e735 \
-    --hash=sha256:ade5e387d2ad0d7ebf59146cc00c8044acbd863725f887353a10df825fc8ae21 \
-    --hash=sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235 \
-    --hash=sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b \
-    --hash=sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f \
-    --hash=sha256:7c1699dfe0cf8ff607dbdcc1e9b9af1755371f92a68f706051cc8c37d447c905 \
-    --hash=sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1 \
-    --hash=sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d \
-    --hash=sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff \
-    --hash=sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473 \
-    --hash=sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e \
-    --hash=sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66 \
-    --hash=sha256:b1282f8c00509d99fef04d8ba936b156d419be841854fe901d8ae224c59f0be5 \
-    --hash=sha256:8defac2f2ccd6805ebf65f5eeb132adcf2ab57aa11fdf4c0dd5169a004710e7d \
-    --hash=sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e \
-    --hash=sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6 \
-    --hash=sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2 \
-    --hash=sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c \
-    --hash=sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15 \
-    --hash=sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2 \
-    --hash=sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42 \
-    --hash=sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b \
-    --hash=sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be \
-    --hash=sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b
+markupsafe==2.1.0 \
+    --hash=sha256:023af8c54fe63530545f70dd2a2a7eed18d07a9a77b94e8bf1e2ff7f252db9a3 \
+    --hash=sha256:09c86c9643cceb1d87ca08cdc30160d1b7ab49a8a21564868921959bd16441b8 \
+    --hash=sha256:142119fb14a1ef6d758912b25c4e803c3ff66920635c44078666fe7cc3f8f759 \
+    --hash=sha256:1d1fb9b2eec3c9714dd936860850300b51dbaa37404209c8d4cb66547884b7ed \
+    --hash=sha256:204730fd5fe2fe3b1e9ccadb2bd18ba8712b111dcabce185af0b3b5285a7c989 \
+    --hash=sha256:24c3be29abb6b34052fd26fc7a8e0a49b1ee9d282e3665e8ad09a0a68faee5b3 \
+    --hash=sha256:290b02bab3c9e216da57c1d11d2ba73a9f73a614bbdcc027d299a60cdfabb11a \
+    --hash=sha256:3028252424c72b2602a323f70fbf50aa80a5d3aa616ea6add4ba21ae9cc9da4c \
+    --hash=sha256:30c653fde75a6e5eb814d2a0a89378f83d1d3f502ab710904ee585c38888816c \
+    --hash=sha256:3cace1837bc84e63b3fd2dfce37f08f8c18aeb81ef5cf6bb9b51f625cb4e6cd8 \
+    --hash=sha256:4056f752015dfa9828dce3140dbadd543b555afb3252507348c493def166d454 \
+    --hash=sha256:454ffc1cbb75227d15667c09f164a0099159da0c1f3d2636aa648f12675491ad \
+    --hash=sha256:598b65d74615c021423bd45c2bc5e9b59539c875a9bdb7e5f2a6b92dfcfc268d \
+    --hash=sha256:599941da468f2cf22bf90a84f6e2a65524e87be2fce844f96f2dd9a6c9d1e635 \
+    --hash=sha256:5ddea4c352a488b5e1069069f2f501006b1a4362cb906bee9a193ef1245a7a61 \
+    --hash=sha256:62c0285e91414f5c8f621a17b69fc0088394ccdaa961ef469e833dbff64bd5ea \
+    --hash=sha256:679cbb78914ab212c49c67ba2c7396dc599a8479de51b9a87b174700abd9ea49 \
+    --hash=sha256:6e104c0c2b4cd765b4e83909cde7ec61a1e313f8a75775897db321450e928cce \
+    --hash=sha256:736895a020e31b428b3382a7887bfea96102c529530299f426bf2e636aacec9e \
+    --hash=sha256:75bb36f134883fdbe13d8e63b8675f5f12b80bb6627f7714c7d6c5becf22719f \
+    --hash=sha256:7d2f5d97fcbd004c03df8d8fe2b973fe2b14e7bfeb2cfa012eaa8759ce9a762f \
+    --hash=sha256:80beaf63ddfbc64a0452b841d8036ca0611e049650e20afcb882f5d3c266d65f \
+    --hash=sha256:84ad5e29bf8bab3ad70fd707d3c05524862bddc54dc040982b0dbcff36481de7 \
+    --hash=sha256:8da5924cb1f9064589767b0f3fc39d03e3d0fb5aa29e0cb21d43106519bd624a \
+    --hash=sha256:961eb86e5be7d0973789f30ebcf6caab60b844203f4396ece27310295a6082c7 \
+    --hash=sha256:96de1932237abe0a13ba68b63e94113678c379dca45afa040a17b6e1ad7ed076 \
+    --hash=sha256:a0a0abef2ca47b33fb615b491ce31b055ef2430de52c5b3fb19a4042dbc5cadb \
+    --hash=sha256:b2a5a856019d2833c56a3dcac1b80fe795c95f401818ea963594b345929dffa7 \
+    --hash=sha256:b8811d48078d1cf2a6863dafb896e68406c5f513048451cd2ded0473133473c7 \
+    --hash=sha256:c532d5ab79be0199fa2658e24a02fce8542df196e60665dd322409a03db6a52c \
+    --hash=sha256:d3b64c65328cb4cd252c94f83e66e3d7acf8891e60ebf588d7b493a55a1dbf26 \
+    --hash=sha256:d4e702eea4a2903441f2735799d217f4ac1b55f7d8ad96ab7d4e25417cb0827c \
+    --hash=sha256:d5653619b3eb5cbd35bfba3c12d575db2a74d15e0e1c08bf1db788069d410ce8 \
+    --hash=sha256:d66624f04de4af8bbf1c7f21cc06649c1c69a7f84109179add573ce35e46d448 \
+    --hash=sha256:e67ec74fada3841b8c5f4c4f197bea916025cb9aa3fe5abf7d52b655d042f956 \
+    --hash=sha256:e6f7f3f41faffaea6596da86ecc2389672fa949bd035251eab26dc6697451d05 \
+    --hash=sha256:f02cf7221d5cd915d7fa58ab64f7ee6dd0f6cddbb48683debf5d04ae9b1c2cc1 \
+    --hash=sha256:f0eddfcabd6936558ec020130f932d479930581171368fd728efcfb6ef0dd357 \
+    --hash=sha256:fabbe18087c3d33c5824cb145ffca52eccd053061df1d79d4b66dafa5ad2a5ea \
+    --hash=sha256:fc3150f85e2dbcf99e65238c842d1cfe69d3e7649b19864c1cc043213d9cd730
 mccabe==0.6.1 \
     --hash=sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42 \
     --hash=sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f