Update all dependencies, add dependabot config

[rvagg]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 3.57%. Comparing base (2ceb61b) to head (5375a89).
Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
builtin/v10/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v11/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v12/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v13/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v14/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v8/miner/invariants.go	0.00%	1 Missing ⚠️
builtin/v9/miner/invariants.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #297   +/-   ##
======================================
  Coverage    3.57%   3.57%           
======================================
  Files         520     520           
  Lines       96959   96959           
======================================
  Hits         3468    3468           
  Misses      92140   92140           
  Partials     1351    1351           

Files with missing lines	Coverage Δ
builtin/v10/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v11/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v12/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v13/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v14/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v8/miner/invariants.go	0.00% <0.00%> (ø)
builtin/v9/miner/invariants.go	0.00% <0.00%> (ø)

[rvagg]

hah, why is staticcheck deciding to be difficult on this one with xerrors.Is?

because I updated xerrors and it now has a deprecation notice